486958 Arrokoth - Knowledge

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volatiles within the dense and opaque Kuiper belt. After the surrounding dust and nebula subsided, solar radiation was no longer obstructed, allowing for photon-induced sublimation to occur in the Kuiper belt. Due to Arrokoth's high rotational obliquity, one polar region faces the Sun continuously for half of its orbital period, resulting in extensive heating and consequent sublimation and loss of frozen volatiles at Arrokoth's poles.

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1,600 km (990 mi) from Arrokoth. This is much closer than the 20,000 km (12,000 mi) region that could be observed during the 17 July 2017 occultation. No brightness changes of the target star have been seen by Hubble, ruling out any optically thick rings or debris down to 1,600 km (990 mi) from Arrokoth. Results of the 2017 and 2018 occultation campaigns were presented at the 50th meeting of the

1116:. The lobi were likely once two objects that later merged in a slow collision. The larger lobus, Wenu, is measured at about 21.6 km (13.4 mi) across its longest axis while the smaller lobus, Weeyo, is measured at 15.4 km (9.6 mi) across its longest axis. Wenu is lenticular in shape, being highly flattened and moderately elongated. Based on shape models of Arrokoth constructed from images taken by the 1093: 6989: 2660: 2887: 9452: 8689: 3070:, the first letter 'M' corresponds to the second half-month of June 2014 while the succeeding letter 'U' indicates that it is the 20th object discovered on the 70th cycle of discoveries (with 69 cycles completed). Each cycle consists of 25 letters representing discoveries, hence 20 + (69 cycles × 25 letters) = 1,745. 2748:

and magnitude 15 by mid-December. It reached naked eye brightness (magnitude 6) from the spacecraft's point of view just 3–4 hours before closest approach. If obstacles were detected, the spacecraft had the option of diverting to a more distant rendezvous, though no moons, rings or other hazards were seen. High-resolution images from

1565:(WGPSN) formally established a naming theme for all features of Arrokoth, which are to be named after words for "sky" in the languages of the world, past and present. In 2021, the first few names were approved, including Sky Crater on the small lobe, later named Weeyo Lobus. In 2022, Kaʼan Arcus was approved for the circular arc on Wenu Lobus. 2524:

initially speculated that Arrokoth might be neither as large nor as dark as previously expected, and that it might be highly reflective or even a swarm. Additional data taken with the Hubble Space Telescope in June and July 2017 revealed that the telescopes had been placed in the wrong location, and that these estimations were incorrect.

1480:. These geological features are thought to have originated from the clumping of smaller planetesimals that come to form the lobi of Arrokoth. The brighter regions of Arrokoth's surface, especially its bright lineation features, are thought to have resulted from the deposition of material that have rolled down from hills on Arrokoth, as 1528:), located at the equatorial end of Weeyo, exhibits rough terrain along with several topographic features that have been identified as possible pits, craters, or mounds. Weeyo does not display distinct units of rolling topography near Sky, likely as a result of resurfacing caused by the impact event that created the crater. 3325: 1540:(initially dubbed "The Road to Nowhere"). From stereographic analysis, the central unit appears to be relatively flat compared to the surrounding units. Stereographic analysis of Arrokoth has also shown that one particular unit located at Wenu's limb ('md') appears to have a higher elevation and tilt than the others. 1971: mi). At this distance, light from the Sun takes over six hours to reach Arrokoth. Arrokoth has last passed aphelion around 1906 and is currently approaching the Sun at a rate of approximately 0.13 AU per year, or about 0.6 kilometers per second (1,300 mph). Arrokoth will approach perihelion by 2055. 3159:

submission format, which by default, the JPL Small-Body Browser implements into its database of orbits. The Hubble Space Telescope is capable of producing highly accurate astrometric measurements of Arrokoth's position, though the data could not be submitted to the Minor Planet Center in the standard

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There were two potentially useful Arrokoth occultations predicted for 2018: one on 16 July and one on 4 August. Neither of these were as good as the three 2017 events. No attempts were made to observe the 16 July 2018 occultation, which took place over the South Atlantic and the Indian

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provinces) to better constrain the size of Arrokoth. The average spacing between these telescopes was around 4 km (2.5 mi). Using the latest observations from Hubble, the position of Arrokoth was known with much better precision than for the 3 June occultation, and this time the shadow

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space observatory to figure out exactly when and where on Earth's surface Arrokoth would cast a shadow. They determined that occultations would occur on 3 June, 10 July, and 17 July in 2017, and set off for places around the world where they could see Arrokoth cover up a different star

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team hypothesizes that the two progenitor objects formed with initially rapid rotations, causing their shapes to become flattened due to centrifugal forces. Over time, the rotation rates of the progenitor objects gradually slowed down as they experienced impacts by small objects and transferred their

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of 2 according to the Minor Planet Center. Hubble Space Telescope observations in May and July 2015 as well as in July and October 2016 have greatly reduced the uncertainties in Arrokoth's orbit, which prompted the Minor Planet Center to assign its permanent minor planet number. In contrast

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The science objectives of the flyby include characterizing the geology and morphology of Arrokoth, and mapping the surface composition (searching for ammonia, carbon monoxide, methane, and water ice). Surveys of the surrounding environment to detect possible orbiting moonlets, a coma, or rings, were

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made four course changes in October and November 2015 to place itself on a trajectory towards Arrokoth. It is the first object to be targeted for a flyby that was discovered after the visiting spacecraft was launched, and is the farthest object in the Solar System ever to be visited by a spacecraft.

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of water ice on Arrokoth's surface would minimally reduce its size by 1 cm (0.39 in). With the lack of frequent cratering events and perturbations of its orbit, the shape and appearance of Arrokoth would remain virtually pristine since the conjoining of two separate objects that formed its

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separately while in orbit around each other. Both progenitor objects are believed to have formed from a single source of material as they appear to be homogeneous in albedo, color, and composition. The presence of rolling topography units on the larger object indicates that it had likely formed from

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orbiting Arrokoth could help determine its mass, no such satellites were found. Under the assumption that both lobi are bound by self-gravity, with the mutual gravity of the two overcoming centrifugal forces that would otherwise separate them, Arrokoth is estimated to have a very low density similar

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spacecraft's approach to Arrokoth, no rotational light curve amplitude was detected by the spacecraft despite Arrokoth's irregular shape. To explain the lack of its rotational light curve, scientists surmised that Arrokoth is rotating on its side, with its rotational axis pointing nearly directly at

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of the northern and southern hemispheres of Arrokoth varies greatly over the course of its orbit around the Sun. As it orbits around the Sun, one polar region of Arrokoth faces the Sun continuously while the other faces away. The solar irradiance of Arrokoth varies by 17 percent due to the low

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As on Weeyo, troughs and pit crater chains are also present along the terminator of the larger lobus Wenu. Wenu consists of eight distinctive units or blocks of rolling topography, each similarly sized at around 5 km (3.1 mi). The units are separated by relatively bright boundary regions.

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team). Assuming Sky has a circular shape, its diameter is 6.7 km (4.2 mi), with a depth of 0.51 km (0.32 mi). Sky is likely an impact crater that was formed by an object 700 m (2,000 ft) across. Two notably bright streaks of similar size are present within Sky, and may

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made its first detection of Arrokoth on 16 August 2018, from a distance of 172 million km (107 million mi). At that time, Arrokoth was visible at magnitude 20, in the direction of the constellation Sagittarius. Arrokoth was expected to be magnitude 18 by mid-November,

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of a person. The progenitor objects must have also merged obliquely at angles greater than 75 degrees in order to account for the present shape of Arrokoth's thin neck while keeping the lobi intact. By the time the two progenitor objects merged, both of them had already been tidally locked in

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to observe these stellar occultations from South America, Africa, and the Pacific Ocean. On 3 June 2017, two teams of NASA scientists tried to detect the shadow of Arrokoth from Argentina and South Africa. When they found that none of their telescopes had observed the object's shadow, it was

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of Kuiper belt objects, the speed of objects impacting Arrokoth is expected to be low, with typical impact speeds around 300 m/s (980 ft/s). At such slow impact speeds, large craters on Arrokoth are expected to be rare. With a low frequency of impact events along with the slow speeds of

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Regardless of the uncertainty surrounding the mechanisms for the flattening of Arrokoth, the subsequent merging of the bodies ancestral to the lobi appeared to be gentle. The present appearance of Arrokoth does not indicate deformation or compression fractures, suggesting that the two progenitor

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to scale. Weeyo is depicted in cool colors (blues and greens) and Wenu in warm (yellows and reds). The labels 'bm', 'dm', 'pm', 'rm' and 'um' indicate bright, dark, patterned (mottled), rough and undifferentiated material, respectively. The eight rolling topographic units 'ma' to 'mh' may be the

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to other orbiting debris left over from their formation. Eventually, loss of momentum, caused by impacts and momentum shifting to other bodies in the cloud, caused the pair to slowly spiral closer until they touched—where over time the joints fused together, forming its present bilobate shape.

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spacecraft during its flyby in 2019. Data collection was successful. A preliminary analysis suggested that the central shadow was missed; only in January 2018 was it realized that SOFIA had indeed observed a very brief dip from the central shadow. The data collected by SOFIA will also be

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Akasa Linea, the neck region connecting the two lobi, has a brighter and less red appearance than the surfaces of either lobus. The brightness of Akasa Linea is likely due to a composition of a more reflective material than the surfaces of the lobi. One hypothesis suggests the bright material

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in 2020, the flattening of Arrokoth may have resulted from the process of sublimation-driven mass loss over a timescale of several million years after the merging of the lobi. At the time of formation, Arrokoth's composition had a higher volatile concentration from the accretion of condensed

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Given the volume equivalent lobus diameters of 15.9 km (9.9 mi) and 12.9 km (8.0 mi), the volume ratio of Wenu to the smaller Weeyo is approximately 1.9:1.0, meaning that Wenu's volume is nearly twice that of Weeyo. Overall, the volume of Arrokoth is around 3,210 km

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Hubble observations were carried out on 4 August 2018, to support the occultation campaign. Hubble could not be placed in the narrow path of the occultation, but due to the favourable location of Hubble at the time of the event, the space telescope was able to probe the region down to

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spacecraft, the dimensions of Wenu are approximately 21 km × 20 km × 9 km (13.0 mi × 12.4 mi × 5.6 mi). In contrast, Weeyo is less flattened, with dimensions of 15 km × 14 km × 10 km (9.3 mi × 8.7 mi

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team. While the Minor Planet Center includes these observations, the JPL Small-Body Database has not yet incorporated the data and only approximates the excess precision of previous astrometric measurements by Hubble in 2014, resulting in an inaccurately calculated orbit with unrealistic

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conducted. Images with resolutions showing details of 30 m (98 ft) to 70 m (230 ft) are expected. From Hubble observations, faint, small satellites orbiting Arrokoth at distances greater than 2,000 km (1,200 mi) have been excluded to a depth of >29th

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of Arrokoth at distances of up to 75,000 km (47,000 mi) from the main body. For the third and final occultation, team members set up another ground-based "fence line" of 24 mobile telescopes along the predicted ground track of the occultation shadow in southern Argentina

2666: 2741:. The object has no detectable atmosphere, and no large rings or satellites larger than 1.6 km (1 mi) in diameter. Nonetheless, a search for a related moon (or moons) continues, which may help better explain the formation of Arrokoth from two individual orbiting objects. 3083:, who had a decent ear but bad handwriting, and scholars since have had considerable difficulty reading his notes. The meanings of the words are also often uncertain, as Strachey and the Powhatan had no language in common. Siebert (1975: p. 324) used comparison with other 2709:

passed by Arrokoth at a distance of 3,538 km (2,198 mi), equivalent to a few minutes of travel at the craft's speed, and one third of the distance of the spacecraft's closest encounter with Pluto. Closest approach occurred on 1 January 2019, at 05:33 UTC

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The similar sizes of the units suggests that each was once a small planetesimal, and that they coalesced to form Wenu. The planetesimals are expected to have accreted slowly by astronomical standards (at speeds of several meters per second), though they must have a very low

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of Arrokoth could not be determined from Hubble observations, the subtle brightness variations suggested that Arrokoth's rotational axis is either pointed toward the Earth or is being viewed at an equator-on configuration with a nearly spherical shape, with a constrained

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by Arrokoth had provided evidence for its bilobate shape. The first detailed image of Arrokoth confirmed its double-lobed appearance and was described as a "snowman" by Alan Stern, as the lobi appeared distinctively spherical. On 8 February 2019, one month after the

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on 17 July 2017. Data from 24 telescopes that captured this event revealed Arrokoth's possible bilobate or binary shape. After the flyby in January 2019, the results from the occultation were shown to precisely fit the observed size and shape of the

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The surface of Arrokoth is lightly cratered and smooth in appearance. Arrokoth's surface has few small craters (from 1 km (0.62 mi) in size to the limits of photographic resolution), implying a paucity of impacts throughout its history. The occurrence of

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team. Initially, it was unclear whether a chord on the target had been recorded. On 6 September 2018, NASA confirmed that the star had indeed been seen to dip by at least one observer, providing important information about the size and shape of Arrokoth.

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as Arrokoth orbits around the Sun. Over the course of its orbit, Akasa Linea is shadowed when the lobi are coplanar to the direction of the Sun, at which times the neck region receives no sunlight, cooling and trapping volatiles in the region.

2572:, Arrokoth was shown to have two "lobes", with diameters of approximately 20 km (12 mi) and 18 km (11 mi), respectively. A preliminary analysis of all collected data suggested that Arrokoth was accompanied by an orbiting 6405:

Marohnic, J. C.; Richardson, D. C.; McKinnon, W. B.; Agrusa, H. F.; DeMartini, J. V.; Cheng, A. F.; et al. (May 2020). "Constraining the final merger of contact binary (486958) Arrokoth with soft-sphere discrete element simulations".

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Stern, S. A.; Weaver, H. A.; Spencer, J. R.; Olkin, C. B.; Gladstone, G. R.; Grundy, W. M.; Moore, J. M.; Cruikshank, D. P.; Elliott, H. A.; McKinnon, W. B.; et al. (17 May 2019). "Initial results from the New Horizons exploration of

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observations eventually ruled them out. Of the five potential targets found with Hubble, Arrokoth was deemed to be the most feasible target for the spacecraft as the flyby trajectory required the least amount of fuel compared to that for

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4.6 billion years ago. Arrokoth had likely formed in a colder environment within a dense, opaque region of the early Kuiper belt where the Sun appeared heavily obscured by dust. Icy particles within the early Kuiper belt experienced

2014:. Since Arrokoth has a low orbital inclination and eccentricity, it is part of the dynamically cold population of classical Kuiper belt objects, which are unlikely to have undergone significant perturbations by Neptune during its outward 3062:

In the convention for minor planet provisional designations, the first letter represents the half-month of the year of discovery while the second letter and numbers indicate the order of discovery within that half-month. In the case for

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Ocean. For the 4 August 2018 event, two teams, consisting of about 50 researchers in total, went to locations in Senegal and Colombia. The event gathered media attention in Senegal, where it was used as an opportunity for

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and rocky material. Trace amounts of methane and other volatile gases in the form of vapors may also be present in Arrokoth's interior, trapped in water ice. Under the assumption that Arrokoth has a low comet-like density of around

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remaining fuel. Using large ground-based telescopes on Earth, researchers began looking in 2011 for candidate objects and searched multiple times per year for several years. However, none of the objects found were reachable by the

5492:...a resolution of about 110 feet (33 meters) per pixel. This processed, composite picture combines nine individual images taken with the Long Range Reconnaissance Imager (LORRI), each with an exposure time of 0.025 seconds... 1121:× 6.2 mi). As a whole, Arrokoth is 36 km (22 mi) across its longest axis and is about 10 km (6.2 mi) thick, with the centers of the lobi separated from each other by 17.2 km (10.7 mi). 2225:

It is unclear how Arrokoth has attained its present flattened shape, though two leading hypotheses have been postulated to explain the mechanisms leading to its flattened shape during the formation of the Solar System. The

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spacecraft. The size of these pits are measured at about 700 m (2,300 ft) across. The exact cause of these pits is unknown; several explanations for these pits include impact events, the collapse of material, the

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ice. Ammonia vapor present on the surface of Arrokoth would solidify around Akasa Linea, where gases cannot escape due to the concave shape of the neck. The brightness of Akasa is thought to be maintained by high seasonal

2152:. The higher temperature of Arrokoth's unilluminated face as measured by REX implies that thermal radiation is emitted from Arrokoth's subsurface, which was predicted to be intrinsically warmer than the exterior surface. 1463:

ancestral building blocks of Wenu. 'sp' are small pits/craters. Green 'lc' (large crater) is Sky, the yellow bright material at the neck is Akasa Linea, and the ring surrounding the purple unit 'mh' is Kaʼan Arcus.

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the coalescence of smaller planetesimal units prior to merging with the smaller object. The larger lobus Wenu appears to be an aggregate of 8 or so smaller components, each approximately 5 km (3 mi) across.

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Hofgartner, Jason D.; Buratti, Bonnie J.; Benecchi, Susan D.; Beyer, Ross A.; Cheng, Andrew; Keane, James T.; et al. (3 March 2020). "Photometry of Kuiper Belt Object (486958) Arrokoth from New Horizons LORRI".

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Benecchi, Susan D.; Buie, Marc W.; Porter, Simon Bernard; Spencer, John R.; Verbiscer, Anne J.; Stern, S. Alan; Zangari, Amanda Marie; Parker, Alex; Noll, Keith S. (December 2019). "The HST Lightcurve of (486958)

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Prentice, Andrew J. R. (9 January 2019). "Ultima Thule: a Prediction for the Origin, Bulk Chemical Composition, and Physical Structure, submitted prior to the New Horizons Spacecraft 100 Pixel LORRI Data Return".

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with the data processing software resulted in a shift in the apparent location of the target. After accounting for the bug, the short dip observed on 10 July was considered to be a detection of the primary body.

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Grundy, W. M.; Bird, M. K.; Britt, D. T.; Cook, J. C.; Cruikshank, D. P.; Howett, C. J. A.; et al. (13 February 2020). "Color, composition, and thermal environment of Kuiper Belt object (486958) Arrokoth".

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Because there have been few to no disruptive impacts on Arrokoth since it formed, the details of its formation have been preserved. From the differing present appearances of the lobi, each is thought to have

972:(Latin for 'farthermost Thule') acquired a metaphorical meaning of any distant place located beyond the "borders of the known world". Once it was determined that the body was a bilobate contact binary, the 1145:

after its closest approach. The flattened lobus Wenu was described as a "pancake", while Weeyo was described as a "walnut" as it appeared less flattened. By observing how the unseen sections of Arrokoth

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Buie, Marc; Porter, Simon B.; Verbiscer, Anne; Leiva, Rodrigo; Keeney, Brian A.; Tsang, Con; Baratoux, David; Skrutskie, Michael; Colas, François; Desmars, Josselin; Stern, S. Alan (26 October 2018).

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background stars, scientists were able to then outline the shapes of both lobi. The cause of Arrokoth's unexpectedly flattened shape is uncertain, with various explanations including sublimation or

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lies between the lobi, small particles are likely to roll down the steep slopes toward the center between each lobus. Another proposal suggests the bright material is produced by the deposition of

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of Virginia and Maryland in the eastern United States after its discovery. The Powhatan language became extinct in the late 18th century and little was recorded of it. In an old word list,

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Lisse, C. M.; Young, L. A.; Cruikshank, D. P.; Sandford, S. A.; Schmitt, B.; Stern, S. A.; et al. (September 2020). "On the Origin and Thermal Stability of Arrokoth's and Pluto's Ices".

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NASA's New Horizons mission to Pluto and the Kuiper Belt is looking for your ideas on what to informally name its next flyby destination, a billion miles (1.6 billion kilometers) past Pluto.

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Spencer, J. R.; Stern, S. A.; Moore, J. M.; Weaver, H. A.; Singer, K. N.; Olkin, C. B.; et al. (13 February 2020). "The geology and geophysics of Kuiper Belt object (486958) Arrokoth".

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color and spectral images of Arrokoth, showing subtle color variations across its surface. The third image is the same MVIC color image superimposed on the higher resolution black and white

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were taken on 1 January. The first images of mediocre resolution arrived the next day. The downlink of data collected from the flyby was expected to last 20 months, through September 2020.

1318:, thus it belongs to the "ultra red" population of cold classical Kuiper belt objects. The red coloration of Arrokoth is caused by the presence of a mix of complex organic compounds called 2600:

Path of Arrokoth's shadow on Earth during its 4 August 2018 occultation of an unnamed star in Sagittarius. This event was successfully observed from locations in Senegal and Colombia.

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spacecraft and most Kuiper belt objects that may be suitable were just too distant and faint to be seen through Earth's atmosphere. In order to find these fainter Kuiper belt objects, the

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Results from the occultation on 17 July showed that Arrokoth could have had a very oblong, irregular shape or be a close or contact binary. According to the duration of the observed

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The mass and density of Arrokoth are unknown. A definitive mass and density estimate cannot be given as the lobi are in contact rather than orbiting each other. Although a possible

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Taken 6.5 minutes before closest approach at 5:33 UT. Note that the view and illumination is now from a slightly different angle as the spacecraft begins to bypass Arrokoth.

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impacts, Arrokoth's surface would remain preserved since its formation. The preserved surface of Arrokoth could possibly give hints to its formation process, as well as signs of

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features appear less red compared to the central region of the smaller lobe Weeyo. The larger lobe Wenu also displays redder regions, informally known as "thumbprints" by the

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Zhao, Y.; Rezac, L.; Skorov, Y.; Hu, S. C.; Samarasinha, N. H.; Li, J.-Y. (October 2020). "Sublimation as an effective mechanism for flattened lobes of (486958) Arrokoth".

7122: 10151: 1381: 5191: 2588:, spectra (e.g. color), and stellar occultation data, illustrations could rely on known data to create a concept of what it might look like prior to spacecraft flyby. 5025:

Lyra, Wladmir; Youdin, Andrew N.; Johansen, Anders (2021). "Evolution of MU69 from a binary planetesimal into contact by Kozai-Lidov oscillations and nebular drag".

4757: 10365: 4812: 2401:, in which the object passes in front of a star from the vantage point of Earth. Since the occultation event is only visible from certain parts of the Earth, the 6807: 2397:

Arrokoth is too small and distant for its shape to be observed directly from Earth, but scientists were able to take advantage of an astronomical event called a

7185: 2900: 1744:. The escaped gases may subsequently freeze and deposit on Arrokoth's surface, and could possibly account for the presence of ices and tholins on its surface. 2121:

eccentricity of its orbit. The average temperature of Arrokoth is estimated to be around 42 K (−231.2 °C; −384.1 °F), with a maximum of around

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in the past. The cold classical population of Kuiper belt objects are thought to be remnant planetesimals left over from the accretion of material during the

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team. Buie reported his finding to the search team for subsequent analysis and confirmation. Arrokoth was the second object found during the search, after

10475: 9564: 7249: 2173:, otherwise the neck would be excessively compressed by the mutual gravity of the lobi such that the entire object would gravitationally collapse into a 1041: 3686:

Benecchi, S. D.; Borncamp, D.; Parker, A. H.; Buie, M. W.; Noll, K. S.; Binzel, R. P.; et al. (December 2019). "The color and binarity of (486958)

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to be assigned a provisional designation during the second half of June 2014. After further observations refining its orbit, it was given the permanent

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McKinnon, William B.; Keane, James T.; Nesvorný, David; Richardson, Derek R.; Grundy, William M.; Hamilton, Douglas P.; et al. (September 2019).

10465: 9509: 9287: 4739: 2535:, New Zealand. The main purpose of those observations was the search for hazardous material like rings or dust near Arrokoth that could threaten the 1169:, before merging. The alignment of the lobi supports the idea that the two had individually formed from the coalescence of a cloud of icy particles. 1104: 6380:

Mao, Xiaochen; McKinnon, William B.; Keane, James Tuttle; Spencer, John R.; Olkin, Catherine; Weaver, Harold A.; Stern, S. Alan (11 December 2019).

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valuable to put constraints on dust near Arrokoth. Detailed results of the search for hazardous material were presented on the 49th Meeting of the

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Arrokoth is thought to have formed from two separate progenitor objects that formed over time from a rotating cloud of small, icy bodies since the

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On 17 July 2017, the Hubble Space Telescope was used to check for debris around Arrokoth, setting constraints on rings and debris within the

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Spencer, John R.; Moore, Jeffrey M.; McKinnon, William B.; Stern, S. Alan; Weaver, Harold A.; Olkin, Catherine B.; et al. (September 2019).

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Singer, Kelsi N.; McKinnon, William B.; Spencer, John R.; Greenstreet, Sarah; Gladman, Brett; Robbins, Stuart J.; et al. (September 2019).

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Topography variations at the limb of Arrokoth suggest that its interior is likely composed of mechanically strong material consisting of mostly

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team were searching for an object in the Kuiper belt that the spacecraft could study after Pluto, and their next target had to be reachable on

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Before the flyby on 1 January 2019, NASA invited suggestions from the public on a nickname to be used for the object. One of the choices,

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in March 2015, after sufficient orbital information had been gathered. The provisional designation indicates that Arrokoth was the 1745th

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in the context of the telescope's search for Kuiper belt objects, and was nicknamed "11" for short. Its existence as a potential target of the

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occurring on Arrokoth was low due to the slower speeds of objects in the Kuiper belt. Over a period of 4.5 billion years, photon-induced

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Porter, Simon B.; Beyer, Ross A.; Keane, James T.; Umurhan, Orkan M.; Bierson, Carver J.; Grundy, William M.; et al. (September 2019).

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Kammer, Joshua A.; Becker, Tracy M.; Retherford, Kurt D.; Stern, S. Alan; Olkin, Catherine B.; Buie, Marc W.; et al. (27 July 2018).

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Mahjoub, Ahmed; Brown, Michael E.; Poston, Michael J.; Hodyss, Robert; Ehlmann, Bethany L.; Blacksberg, Jordana; et al. (June 2021).

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Arrokoth is a contact binary consisting of two lobes (lobi) attached by a narrow neck or waist, which is encircled by a bright band named

10460: 1407:, the quantity of reflected light in visible spectrum, is measured at 21 percent, typical for most Kuiper belt objects. The overall 788: 9530: 6596:

Stern, S. A.; Weaver, H. A.; Spencer, J. A.; Elliott, H. A.; et al. (June 2018). "The New Horizons Kuiper Belt Extended Mission".

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were once present on Arrokoth, but were quickly lost due to Arrokoth's small mass. However, less volatile materials such as methanol,

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Keane, James T.; Porter, Simon B.; Beyer, Ross; Umurhan, Orkan M.; McKinnon, William B.; Moore, Jeffrey M.; et al. (June 2022).

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or reflectivity of Arrokoth varies from 5 percent to 12 percent due to various bright features on its surface. Its overall

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Young, Eliot F.; Buie, Marc W.; Porter, Simon B.; Zangari, Amanda M.; Stern, S. Alan; Ennico, Kimberly; et al. (October 2017).

6893: 6110: 2101:

upon approach confirmed that its rotation is tilted, with its south pole facing towards the Sun. The rotational axis of Arrokoth is

1358:

could be retained over a longer period of time, and may likely account for the reddening and production of tholins on Arrokoth. The

4676:

McKinnon, W. B.; Richardson, D. C.; Marohnic, J. C.; Keane, J. T.; Grundy, W. M.; Hamilton, D. P.; et al. (13 February 2020).

3991: 802: 4092: 1987:

does not include these additional observations and purports the orbit to be highly uncertain, with an uncertainty parameter of 5.

1424:

in the Kuiper belt is thought to be uncommon, with a very low impact rate over the course of one billion years. Due to the slower

9557: 8746: 7906: 6844: 6292: 5560: 7131: 9841: 9001: 8789: 8315: 7949: 5440: 4285: 1044:

were both operated in Maryland and were prominently involved in Arrokoth's discovery. With the permission of the elders of the

3456:

Buie, Marc W.; Porter, Simon B.; Tamblyn, Peter; Terrell, Dirk; Parker, Alex H.; Baratoux, David; et al. (January 2020).

2531:

was successfully placed close to the predicted centerline for the second occultation while flying over the Pacific Ocean from

9502: 8997: 8589: 8311: 7958: 6754: 3935: 1937: 1736:, the trapped volatile gases inside Arrokoth would migrate outward and escape from the surface, similarly to the scenario of 1536:

in order to merge and form compact bodies at these speeds. The central unit ('mh') is encircled by a bright annular feature,

6859: 5195: 6468: 4426: 898: 764: 172: 4315:

McKinnon, William B.; Mao, Xiaochen; Schenk, P. M.; Singer, K. N.; Robbins, S. J.; White, O. L.; et al. (July 2022).

2416:

on each of these dates. Based on this string of three occultations, scientists were able to trace out the object's shape.

1920:

of 0.042, Arrokoth follows a nearly circular orbit around the Sun, only slightly varying in distance from 42.7 AU at

1387:

From color and spectral measurements of Arrokoth, the surface displays subtle color variation among its surface features.

10166: 4899: 1998:

by the Minor Planet Center as it orbits in the outer Solar System beyond Neptune. Having a non-resonant orbit within the

1125:(770 cu mi), though this estimate is largely uncertain due to weak constraints on the thicknesses of the lobi. 7450: 6205: 5886:(Settings: "Return ephemerides", Ephemeris Options: start date "2018/12/31" and output dates "365"). Minor Planet Center 5533: 4761: 2169:. In order to maintain the shape of the neck, the density of Arrokoth must be less than the maximum possible density of 9550: 7853: 5691:

Earle, Alissa M.; Binzel, R. P.; Keane, J. T.; Vanatta, M.; Grundy, W. M.; Moore, J. M.; et al. (September 2019).

3842: 3272: 1141:

flyby, Arrokoth was found to be more flattened than initially thought, based on additional images of Arrokoth taken by

7327: 5509:

Moore, J. M.; McKinnon, W. B.; Spencer, J. R.; Stern, S. A.; Britt, D.; Buratti, B. J.; et al. (September 2019).

5320:

Cruikshank, D. P.; Grundy, W. M.; Britt, D. T.; Quirico, E.; Schmitt, B.; Scipioni, F.; et al. (1 January 2019).

4816: 4445: 10470: 9681: 7743: 7688: 7398: 7280: 6811: 6260: 6019: 4784: 4261: 4122: 4055: 4030: 3123: 3045: 3011: 2973: 2964: 1307: 822: 7606: 7189: 5087:

S on the Near-infrared Spectrum of Irradiation Residue and Applications to the Kuiper Belt Object (486958) Arrokoth"

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Stern, S. A.; Spencer, J. R.; Weaver, H. A.; Olkin, C. B.; Moore, J. M.; Grundy, W.; et al. (9 January 2019).

1338:

solar radiation. The presence of sulfur-rich tholins on Arrokoth's surface implies that volatiles such as methane,

1218: 1100: 984: 55: 5939: 4889: 2794: 3160:

format. To overcome these limitations, the astrometric data was separately submitted in a modified format by the

2914: 2622: 2541: 2504:

Artist concept of an ellipsoid shape for Arrokoth, a shape that could not be ruled out prior to the flyby in 2019

368: 7424: 5592: 1060:

in the District of Columbia on 12 November 2019. Prior to the ceremony, the name was accepted by the IAU's

9613: 6318: 5692: 5667:

Katz, J. I. (4 February 2019). "Ultima Thule (486958; 2014 MU69): Necklace, Composition, Rotation, Formation".

5348: 3952:

Porter, S. B.; Bierson, C. J.; Umurhan, O.; Beyer, R. A.; Lauer, T. A.; Buie, M. W.; et al. (March 2019).

3140:

Composite of black and while and color photographs taken respectively by the LORRI and MVIC instruments aboard

2609:. Despite some stations being affected by bad weather, the event was successfully observed, as reported by the 2557: 735: 294: 7082:

Buie, M. W.; Porter, S. B.; Tamblyn, P.; Terrell, D.; Verbiscer, A. J.; Keeney, B.; et al. (March 2019).

5376:

Greenstreet, Sarah; Gladman, Brett; McKinnon, William B.; Kavelaars, J. J.; Singer, Kelsi N. (February 2019).

4654: 3521: 10141: 9772: 6977: 5510: 5350:

Impact craters on 2014 MU69: The geologic history of MU69 and Kuiper belt object size-frequency distributions

3438: 2619: 2308:

Arrokoth was discovered on 26 June 2014 using the Hubble Space Telescope during a preliminary survey to

2196: 2019: 1940:

from Neptune is 12.75 AU.) Arrokoth's orbit appears to be stable over the long term; simulations by the

6568:

Spencer, J. R.; Buie, M. W.; Parker, A. H.; Weaver, H. A.; Porter, S. B.; Stern, S. A.; et al. (2015).

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originated in the deposition of small particles that had fallen from the lobi over time. Since Arrokoth's

10224: 9874: 9598: 8739: 8456: 8451: 7899: 7272: 6571:

The Successful Search for a Post-Pluto KBO Flyby Target for New Horizons Using the Hubble Space Telescope

6045:

Porter, S. B.; Parker, A. H.; Buie, M.; Spencer, J.; Weaver, H.; Stern, S. A.; et al. (March 2015).

4466: 4192: 2726: 2644: 2462: 2240: 9518: 4427:"Resurrecting Virginia Algonquian from the dead: The reconstituted and historical phonology of Powhatan" 2677:

approach to Arrokoth, constructed from images taken by the spacecraft during its flyby on 1 January 2019

1299:, which also display strong red spectral slopes along with signs of methanol present on their surfaces. 10214: 9834: 9762: 9752: 7814: 7790: 7782: 3376:"The Geophysical Environment of (486958) Arrokoth— A Small Kuiper Belt Object Explored by New Horizons" 2576:

about 200–300 km (120–190 mi) away from the primary. It was later realized, however, that an

7524: 5906: 4232: 2287: 980:"Ultima" and the smaller lobus "Thule". They are now formally named "Wenu" and "Weeyo", respectively. 693: 10229: 9757: 7806: 7798: 7773: 7665: 7632: 7584: 7554: 7494: 7379: 7349: 7211: 6940: 6915: 6781: 6230: 5471: 5228: 4399: 4022: 3894: 3807: 3204: 2498: 2492:

Artist concept of Arrokoth as a contact binary, illustrating the understanding as of August 2017

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against the surrounding gas and dust, and gravitationally coalesced into clumps of larger particles.

1664: 977: 78: 9281: 4365: 10450: 9864: 9593: 8443: 8432: 8031: 7085:

Stellar Occultation Results for (486958) 2014 MU69: A Pathfinding Effort for the New Horizons Flyby

6569: 4495: 2634: 2561:

of Arrokoth was successfully observed by at least five of the mobile telescopes. Combined with the

2348: 2213: 2064:

Hubble Space Telescope observations show that the brightness of Arrokoth varies by around 0.3

2010:

plane by 2.45 degrees, relatively low compared to other classical Kuiper belt objects such as

1933: 1430: 1161:, which is situated between them. This near-parallel alignment of the lobi suggests that they were 955: 917: 833: 106: 17: 6973:

Debris search around (486958) 2014 MU69: Results from SOFIA and ground-based occultation campaigns

2689:

after closest approach. The silhouette of Arrokoth's shape can be seen among the background stars.

2252:

objects had merged very slowly at a speed of 2 m/s (6.6 ft/s)—comparable to the average

1445:

of volatile materials, or the venting and escape of volatile gases from the interior of Arrokoth.

1279:-based compounds resulting from irradiation should also be present, albeit in the form of complex 10375: 9777: 9661: 9573: 9365: 9336: 8818: 8540: 7965: 7826: 5082: 3877: 3812: 3375: 2806: 2253: 1984: 1411:(the quantity of reflected light of any wavelength) of Arrokoth is measured at 6.3 percent. 1327: 687: 531: 430: 398: 331: 323: 283: 270: 68: 7473:"What to Expect When New Horizons Visits 2014 MU69, Ultima Thule, And When We Will Get Pictures" 4059: 2140:

instrument indicate that the mean surface temperature of Arrokoth's unilluminated face is about

1500:

where bright material rolled into the depression. Four subparallel troughs are present near the

1468:

The surfaces of each lobus of Arrokoth display regions of varying brightness along with various

1454: 1187: 10391: 10345: 10249: 9698: 8771: 8766: 8732: 8622: 8579: 7931: 7926: 7892: 7861: 6469:"Hubble to the rescue! The last-ditch effort to discover a Kuiper belt target for New Horizons" 2337: 2301: 2061: 1995: 1508:

of Sky. The surface of Weeyo exhibits bright mottled regions separated by broad, dark regions (

1303: 1293: 1037: 941: 878: 840: 780: 746: 213: 84: 6381: 4678:"The solar nebula origin of (486958) Arrokoth, a primordial contact binary in the Kuiper Belt" 2185: 1306:

in 2016 revealed that Arrokoth has a red coloration, similar to other Kuiper belt objects and

999: 10495: 10426: 9883: 9827: 9603: 9171: 9166: 8584: 8574: 6472: 6383:

Spindown of 2014 MU69 ("Ultima Thule") by impact of small, cold classical Kuiper belt objects

5907:"'Everything about this flyby is tougher': New Horizons just over 100 days from Ultima Thule" 5741: 4317:"Snow Crash: Compaction Craters on (486958) Arrokoth and Other Small KBOs, With Implications" 4114: 3828: 3155:

This discrepancy is due to limitations of the Minor Planet Center's standard satellite-based

2817: 2738: 2711: 2406: 2390:. On 28 August 2015, Arrokoth was officially selected by NASA as a flyby target for the 2201: 2069: 2065: 1979: 1676: 1533: 1436:

Numerous small pits on Arrokoth's surface were identified in high resolution images from the

1069: 1045: 809:

21 and 15 km (13 and 9 mi) across, that are joined along their major axes. With an

380: 252: 7246:"New Horizons Team Successfully Observes Next Target, Sets the Stage for Ultima Thule Flyby" 4115:"NASA's Hubble Telescope Finds Potential Kuiper Belt Targets for New Horizons Pluto Mission" 2782: 10409: 10156: 10133: 9869: 9671: 9415: 9270: 8814: 7845: 7837: 7306: 7041: 6981: 6678: 6615: 6578: 6502: 6425: 6162: 6055: 5999: 5646: 5399: 5267: 5156: 5098: 5044: 4975: 4699: 4608: 4328: 3962: 3764: 3578: 3479: 3387: 3300: 3119: 3084: 2466: 2258: 1991: 1941: 1917: 1488: 1238: 1214: 818: 305: 223: 7877: 7305:. 50th Meeting of the AAS Division for Planetary Sciences. American Astronomical Society. 7083: 5621: 5321: 3953: 2850: 2838: 2788:

24 hours before closest approach, 1.9 million km (1.2 million mi)

39: 8: 10244: 10171: 10026: 9991: 9422: 9345: 9161: 8783: 8383: 8295: 8182: 8170: 7943: 7831: 7821: 6073: 6046: 5623:

Overview of initial results from the reconnaissance flyby of a Kuiper Belt planetesimal:

4166: 3996: 2892: 2800:

12 hours before closest approach, 1 million km (0.62 million mi)

2705:

Moving at a speed of 51,500 km/h (858 km/min; 14.3 km/s; 32,000 mph)

2398: 2309: 2297: 2015: 1916: mi), taking 297.7 years to complete a full orbit around the Sun. Having a low 1392: 1377: 1228: 1085: 1061: 909: 814: 357: 8037: 7310: 7045: 6985: 6682: 6619: 6582: 6506: 6429: 6166: 6059: 6025: 6003: 5650: 5403: 5271: 5160: 5102: 5048: 4979: 4703: 4612: 4332: 4161: 3966: 3768: 3582: 3483: 3391: 2865: 1928:. Because Arrokoth has a low orbital eccentricity, it does not approach close enough to 10161: 10014: 9456: 9137: 8693: 8559: 8549: 7993: 7693: 7059: 7031: 6864: 6631: 6605: 6528: 6441: 6415: 6178: 6152: 5856: 5668: 5636: 5417: 5389: 5299: 5172: 5146: 5116: 5060: 5034: 5007: 4965: 4870: 4852: 4789: 4731: 4689: 4632: 4598: 4346: 3782: 3754: 3720: 3702: 3665: 3647: 3610: 3568: 3497: 3469: 3403: 2650: 2137: 1795: 1501: 1469: 1442: 723: 498: 204: 7869: 6836: 5879: 4677: 2292: 1983:

to the orbit calculated by the Minor Planet Center, Arrokoth's observation arc in the

1205: 10305: 10280: 10270: 10002: 9656: 9608: 9355: 8875: 8639: 8076: 7063: 6635: 6520: 6445: 6182: 6015: 5421: 5303: 5291: 5283: 5176: 5120: 5064: 5011: 4999: 4991: 4874: 4735: 4723: 4715: 4636: 4624: 4589: 4350: 4257: 3786: 3724: 3669: 3614: 3602: 3594: 3501: 3407: 2776:

24 Dec 2018, at a distance of 10 million km (6.2 million mi)

2717: 2569: 2411: 2161: 1893: 1757: 1729: 1285: 1264: 1151: 1057: 1008: 1003:

Pamunkey tribal elder Reverend Nick Miles commencing the naming ceremony for Arrokoth

276: 240: 157: 7303:

Pre-encounter update on (486958) 2014MU69 and occultation results from 2017 and 2018

2041:

Sequence of three images showing Arrokoth's rotation over a period of 2.5 hours

1951:

flyby in January 2019, Arrokoth's distance from the Sun was 43.28 AU (6.47

1384:

instruments did not detect any signature of solar wind interaction around Arrokoth.

893:

in October 2014 and it was unofficially designated as "Potential Target 1", or

9782: 9119: 8858: 8438: 8422: 8391: 8065: 8006: 7130:. 2017 AGU Fall Meeting. Applied Physics Laboratory. pp. 12–15. Archived from 7049: 6889: 6623: 6532: 6510: 6464: 6433: 6170: 6106: 6007: 5966: 5827: 5809: 5791: 5773: 5755: 5635:. 50th Lunar and Planetary Science Conference 2019. Lunar and Planetary Institute. 5407: 5275: 5164: 5106: 5052: 4983: 4862: 4707: 4616: 4336: 3961:. 50th Lunar and Planetary Science Conference 2019. Lunar and Planetary Institute. 3772: 3712: 3657: 3586: 3487: 3395: 3108: 3080: 3022: 2988: 2941: 2606: 2370:. Three more candidate targets were later discovered with Hubble, though follow-up 2232: 2117: 1652: 1473: 1404: 1388: 1355: 1343: 1275:-rich. Given the abundance of methanol on Arrokoth's surface, it is predicted that 1012: 959: 623: 606: 233: 122: 10117: 8829: 7768: 7715: 6762: 1944:

show that its orbit will not significantly change over the next 10 million years.

1196: 847:

to target in its first extended mission; it was chosen over two other candidates,

10265: 9703: 9646: 9631: 9309: 9293: 9016: 8934: 8804: 7091:. 50th Lunar and Planetary Science Conference 2019. Lunar and Planetary Institute 6705:"New Horizons team successfully observes new stellar occultation of Ultima Thule" 6659: 6437: 6333:. EPSC-DPS Joint Meeting 2019. Vol. 13. European Planetary Science Congress. 6174: 5700:. EPSC-DPS Joint Meeting 2019. Vol. 13. European Planetary Science Congress. 5518:. EPSC-DPS Joint Meeting 2019. Vol. 13. European Planetary Science Congress. 5356:. EPSC-DPS Joint Meeting 2019. Vol. 13. European Planetary Science Congress. 5168: 5056: 4662:. EPSC-DPS Joint Meeting 2019. Vol. 13. European Planetary Science Congress. 4001: 3716: 3661: 3535:. EPSC-DPS Joint Meeting 2019. Vol. 13. European Planetary Science Congress. 2729:. At this distance, the one-way transit time for radio signals between Earth and 2553: 2343:

Arrokoth was first imaged by Hubble on 26 June 2014, 10 days after the

1975: 1628: 1481: 1359: 1271:

in Arrokoth's spectrum at 1.8 μm indicates that these organic compounds are

1268: 1158: 568: 260: 7756: 7633:"Ultima in View: New Horizons Makes First Detection of Kuiper Belt Flyby Target" 7425:"A Journey Into the Solar System's Outer Reaches, Seeking New Worlds to Explore" 7160:"New Horizons team prepares for stellar occultation ahead of Ultima Thule flyby" 5258:

Jewitt, David C.; et al. (13 February 2020). "A deep dive into the abyss".

3927: 3200: 3087:

to interpret Strachey's handwriting, and deciphers Strachey's transcriptions as

10402: 10300: 10219: 9718: 9686: 9651: 9324: 9248: 8951: 8841: 8333: 7273:"New Horizons support observations for 2014MU69 encounter – HST Proposal 15450" 7054: 7012: 5412: 5377: 5111: 4866: 3777: 3742: 3492: 3457: 2826: 2813: 2681: 2639: 2596: 2452: 2205: 2126: 2106: 1245: 810: 338: 316: 7350:"NASA's New Horizons Completes Record-Setting Kuiper Belt Targeting Maneuvers" 6627: 6351:"NASA's New Horizons Reveals Geologic 'Frankenstein' That Formed Ultima Thule" 6054:. 46th Lunar and Planetary Science Conference. Lunar and Planetary Institute. 5512:

Scarp Retreat on MU69: Evidence and Implications for Composition and Structure

3867: 3428: 1491:

feature named 'Sky' (previously dubbed 'Maryland' after the home state of the

10439: 10315: 10285: 9942: 9742: 9641: 9636: 9375: 8810: 8043: 7982: 6730:"These are the 2017 stellar occultation predictions for the object 2014 MU69" 6011: 5472:"Spot On! New Horizons Spacecraft Returns Its Sharpest Views of Ultima Thule" 5336:. 50th Lunar and Planetary Science Conference. Lunar and Planetary Institute. 5287: 4995: 4719: 4023:"Hubble Survey Finds Two Kuiper Belt Objects to Support New Horizons Mission" 3955:

A Contact Binary in the Kuiper Belt: The Shape and Pole of (486958) 2014 MU69

3598: 1716: 1515: 1425: 1280: 1162: 9542: 6941:"SOFIA in Right Place at Right Time to Study Next New Horizons Flyby Object" 5279: 4987: 4711: 4620: 3590: 2770: 10275: 9851: 9808: 9581: 9435: 9404: 9392: 9314: 9033: 8924: 8850: 8667: 8652: 8616: 8594: 8521: 8052: 8012: 7689:"NASA's New Horizons Mission Releases Snowman-like Picture of Ultima Thule" 6524: 5295: 5003: 4894: 4727: 4628: 4286:"2014 MU69 revealed as a contact binary in first New Horizons data returns" 4044: 3987: 3983: 3606: 3458:"Size and Shape Constraints of (486958) Arrokoth from Stellar Occultations" 3297: 3142: 2577: 2532: 2265: 2113:

imaging data, Arrokoth's rotation period is determined to be 15.938 hours.

2082: 2047: 1733: 1505: 1421: 1362:

of organic compounds and volatiles on Arrokoth was also thought to produce

1276: 1241: 1166: 913: 806: 797: 63: 9487: 8835: 7188:. Africa Initiative for Planetary and Space Sciences. 2018. Archived from 4452:. Carleton University, School of Linguistics and Applied Language Studies. 2002:

region 39.5–48 AU from the Sun, Arrokoth is formally classified as a

1518:, in which they were eroded due to the sublimation of volatiles, exposing 10396: 10295: 9976: 9971: 9798: 9747: 9708: 9350: 9318: 9243: 9233: 9178: 9142: 8569: 8527: 8515: 8324: 8001: 4341: 4316: 3399: 3079:

The only record of the word was collected in 1610–1611 by English writer

2585: 2548: 2512: 2371: 1999: 1519: 1408: 1335: 1311: 1296: 1267:

on the surface of Arrokoth, but no evidence of water ice. One particular

1147: 1133: 1096: 963: 784: 649: 636: 588: 346: 7666:"NASA's New Horizons Spacecraft Takes the Inside Course to Ultima Thule" 6729: 6048:

Orbits and Accessibility of Potential New Horizons KBO Encounter Targets

4785:"What We've Learned About Ultima Thule From NASA's New Horizons Mission" 3801: 3201:"JPL Small-Body Database Browser: 486958 Arrokoth (2014 MU69)" 2035: 1504:

of Weeyo, along with two possible kilometer-sized impact craters on the

1399:

team. The thumbprint features are located near Wenu's limb. The surface

10310: 10085: 10061: 9907: 9767: 9713: 9370: 9303: 9080: 9069: 9063: 9057: 9051: 9038: 9027: 9021: 8648: 8564: 8497: 8427: 8396: 6201: 5931: 3156: 2905: 2701: 2269: 2190:

Illustration depicting the hypothesized formation sequence of Arrokoth.

2130: 2102: 1921: 1854: 1769: 1737: 1606: 1554: 1545: 1497: 1367: 1331: 1323: 1256: 1252: 1080: 1021:

is glossed as 'sky', but it would seem that it actually meant 'cloud'.

849: 552: 244: 6916:"SOFIA to Make Advance Observations of Next New Horizons Flyby Object" 6206:"The PI's Perspective: The Heroes of the DSN and the 'Summer of MU69'" 4233:"New Horizons, Meet Ultima Thule: Probe's Next Target Gets a Nickname" 2985:

team use this classical pronunciation, the pseudo-Latin pronunciation

1978:

of 851 days, Arrokoth's orbit is fairly well-determined, with an

10290: 10097: 10073: 10038: 9960: 9948: 9803: 9693: 9430: 9360: 9258: 9238: 9107: 9091: 9075: 9010: 8981: 8940: 8798: 8659: 8611: 8554: 8492: 8477: 8463: 8271: 8259: 8102: 7495:"Maneuver Moves New Horizons Spacecraft toward Next Potential Target" 7212:"New Horizons Team Reports Initial Success in Observing Ultima Thule" 5561:"The latest picture of Ultima Thule reveals a remarkably smooth face" 4142: 4089:"NASA's New Horizons Team Selects Potential Kuiper Belt Flyby Target" 2763:

LORRI images of Arrokoth from December 2018 to January 2019

2565:

observations, this put constraints on possible debris near Arrokoth.

2520: 2443: 2377: 2361: 2352: 1780: 1680: 1347: 949: 860: 829: 6515: 6490: 5378:"Crater Density Predictions for New Horizons flyby target 2014 MU69" 1092: 10187: 9996: 9623: 9264: 9253: 9222: 9197: 9155: 9113: 9086: 8969: 8957: 8913: 8901: 8889: 8406: 8401: 8378: 8283: 8247: 8235: 8223: 8211: 8194: 8148: 8126: 8114: 8090: 7036: 7020:: HST FGS Observations during the 2017 July 17 Stellar Occultation" 6610: 6420: 6157: 5861: 5673: 5641: 5394: 5375: 5151: 5039: 4970: 4857: 4694: 4603: 4400:"New Horizons Kuiper Belt Flyby Object Officially Named 'Arrokoth'" 4370: 3759: 3707: 3652: 3573: 3474: 3114:'it is a cloud, it is cloudy'. Given that the first vowel is long ( 2871:

5:42 UT, after closest approach; 8,900 km (5,500 mi)

2434: 2174: 2011: 2007: 1925: 1725: 1363: 1260: 1249: 1033: 4366:"NASA renames faraway ice world after Nazi-link backlash (Update)" 4138:"Hubble Telescope Spots Post-Pluto Targets for New Horizons Probe" 2053:

Near-polar view of Arrokoth's rotation over a period of nine hours

1522:

of darker material irradiated by sunlight. Another bright region (

10355: 10335: 9938: 9912: 9298: 8929: 8864: 8632: 8358: 8353: 8348: 8343: 8338: 8330: 8205: 8164: 8159: 8142: 8137: 8060: 7977: 7555:"On Track: New Horizons Carries Out Third KBO Targeting Maneuver" 3872: 3433: 2573: 1929: 1868: 1549: 1339: 486: 8724: 7884: 6404: 5346: 5330:("Ultima Thule"): The role of synthetic organic solids (tholins) 5192:"New Horizons: Possible Clouds on Pluto, Next Target is Reddish" 1669:

the circular linea (the "Road to Nowhere") in the center of Wenu

10234: 9986: 9981: 9819: 9410: 9275: 9132: 8373: 8368: 8363: 8016: 7399:"NASA's New Horizons Will Visit Ultima Thule on New Year's Day" 6316: 4675: 4656:

Geology and Geophysics of 2014 MU69: New Horizons Flyby Results

4253:

The Tourism Imaginary and Pilgrimages to the Edges of the World

2947: 1400: 1351: 1319: 1272: 669: 454: 3636: 3037: 2956: 2239:

In an alternative hypothesis formulated by researchers of the

128: 9917: 9734: 7607:"Ultima Thule: Preliminary Science Results from New Horizons" 6548:"A World Beyond Pluto: Finding a New Target for New Horizons" 3031: 2997: 2950: 2694: 1882: 1840: 1741: 1315: 935: 7525:"New Horizons Continues Toward Potential Kuiper Belt Target" 6860:"Chasing Shadows for a Glimpse of a Tiny World Beyond Pluto" 5319: 5136: 1259:. Spectral measurements from LEISA revealed the presence of 140: 8507: 8020: 7986: 7970: 7010: 6976:. 49th Meeting of the AAS Division for Planetary Sciences. 4758:"New Horizons' Next Target Just Got a Lot More Interesting" 3273:"New Horizons Chooses Nickname for 'Ultimate' Flyby Target" 3003: 2461:

Arrokoth briefly blocked the light from an unnamed star in

1477: 890: 828:

Arrokoth was discovered on 26 June 2014 by astronomer

792: 543: 466: 131: 6577:. European Planetary Science Congress 2015. Vol. 10. 3685: 2351:

images from Hubble, Arrokoth was identified by astronomer

137: 6595: 6134: 5508: 4813:"New Horizons' Evocative Farewell Glance at Ultima Thule" 4652: 3951: 3122:

in Powhatan, so the name is approximatable in English as

2722: 1698: 1459: 1157:

The longest axes of the lobi are nearly aligned with the

10366:

Cape Canaveral Air Force Station Space Launch Complex 41

7300: 7081: 6884: 6882: 6808:"New Mysteries Surround New Horizons' Next Flyby Target" 6320:

On the Origin of the Remarkable Contact Binary (486958)

5441:"New Horizons' Newest and Best-Yet View of Ultima Thule" 5080: 3693:

and other long-range New Horizons Kuiper Belt targets".

3455: 3429:"Press Briefing: The developing picture of Ultima Thule" 2165:

to that of comets, with an estimated minimum density of

801:

conducted a flyby on 1 January 2019. Arrokoth is a

6567: 6379: 6044: 5690: 5619: 4578: 4314: 4279: 4277: 4275: 4273: 4082: 4080: 4078: 4076: 4074: 4072: 3558: 3519: 3373: 1892:

Arrokoth orbits the Sun at an average distance of 44.6

1283:. Arrokoth's spectrum shares similarities with that of 1084:

Shape model of Arrokoth, colored to show variations in

7154: 7152: 6969: 5694:

Latitude Zones and Seasons on 2014 MU69 'Ultima Thule'

4922:"How Ultima Thule Is Like a Sticky, Pull-Apart Pastry" 3848:. Applied Physics Laboratory. December 2018. p. 5 2901:

List of minor planets and comets visited by spacecraft

2336:

team initiated a search for suitable targets with the

1808:

trajectory from January 19, 2006 to December 30, 2030

1052:

was proposed to the IAU and formally announced by the

987:(IAU) announced the object's permanent official name, 6879: 6653: 6651: 6649: 6647: 6645: 5534:"The PI's Perspective: Looking Back, Looking Forward" 3124: 3046: 3012: 2974: 2965: 2347:

team began their search for potential targets. While

1767:

potential targets 1 to 3. Arrokoth (PT1) is in blue,

134: 6894:"New Horizons prepares for encounter with 2014 MU69" 6801: 6799: 6782:"NASA's New Horizons Team Strikes Gold in Argentina" 5742:"Arrokoth's Prominent Features Given Official Names" 5686: 5684: 5223: 5221: 5219: 5217: 5215: 5213: 4476:. Astronomical International Union. 8 November 2019. 4270: 4069: 4049:"New Horizons HST KBO Search Results: Status Report" 3741:

Thirouin, Audrey; Sheppard, Scott S. (August 2019).

3034: 3028: 3000: 2994: 2953: 2882: 1244:

show that Arrokoth's spectrum exhibits a strong red

7660: 7658: 7186:"AFIPS participation to NASA expedition in Senegal" 7149: 6837:"The Case of the Dog that Didn't Bark in the Night" 6831: 6829: 6776: 6774: 6772: 6386:. AGU Fall Meeting 2019. American Geophysical Union 4954: 4648: 4646: 4107: 3025: 2991: 2944: 2479:

Pre-flyby conceptual art, based on occultation data

2006:, or cubewano. Arrokoth's orbit is inclined to the 1599:

the larger lobe of Arrokoth, provisionally "Ultima"

1042:

Johns Hopkins University Applied Physics Laboratory

125: 6642: 6459: 6457: 6455: 6101: 6099: 6097: 6095: 5527: 5525: 5504: 5502: 5500: 5466: 5464: 5462: 5024: 4394: 4392: 4390: 4388: 4202:. Astronomical International Union. 12 March 2017. 3800: 3515: 3513: 3511: 1391:of Arrokoth show that the Akasa (neck) region and 789:object in the Solar System visited by a spacecraft 787:. Arrokoth became the farthest and most primitive 7517: 6796: 6310: 6286: 6284: 6282: 5961: 5959: 5957: 5681: 5586: 5584: 5582: 5340: 5210: 4842: 3895:"New Horizons Successfully Explores Ultima Thule" 3632: 3630: 3628: 3626: 3624: 3423: 3421: 3419: 3417: 2931: 2929: 843:as part of a search for a Kuiper-belt object for 10437: 7680: 7672:. Applied Physics Laboratory. 18 December 2018. 7655: 7625: 7591:. Applied Physics Laboratory. 6 September 2017. 7577: 7487: 7466: 7464: 7342: 7322: 7320: 6826: 6769: 6375: 6373: 6371: 6293:"New Results Probe the Origin of "Ultima Thule"" 6237:. Applied Physics Laboratory. 20 December 2018. 6130: 6128: 6126: 6124: 5734: 5552: 5478:. Applied Physics Laboratory. 22 February 2019. 5371: 5369: 5367: 5365: 5363: 4881: 4643: 4433:. University of Georgia Press. pp. 285–453. 3740: 3681: 3679: 2296:Discovery images of Arrokoth, cropped from five 2116:Due to the high axial tilt of its rotation, the 7585:"New Horizons Files Flight Plan for 2019 Flyby" 7561:. Applied Physics Laboratory. 29 October 2015. 7547: 7531:. Applied Physics Laboratory. 26 October 2015. 7501:. Applied Physics Laboratory. 23 October 2015. 7356:. Applied Physics Laboratory. 5 November 2015. 7121:Green, Jim; Stern, S. Alan (12 December 2017). 6749: 6747: 6589: 6452: 6344: 6342: 6340: 6225: 6223: 6092: 5982: 5980: 5971:"New Horizons extended mission target selected" 5880:"Minor Planet Ephemeris Service: Query Results" 5874: 5872: 5849: 5847: 5845: 5843: 5841: 5720:Working Group for Planetary System Nomenclature 5711:Schulz, Rita (4 May 2020). Lissauer, J. (ed.). 5522: 5497: 5459: 4776: 4385: 4310: 4308: 4306: 4215:"Help Nickname New Horizons' Next Flyby Target" 3992:"The Moment We First Saw Ultima Thule Up Close" 3799: 3736: 3734: 3508: 2519:formed a specialized "KBO Chasers" team led by 2097:spacecraft. Subsequent images of Arrokoth from 1563:Working Group for Planetary System Nomenclature 1036:people indigenous to the Tidewater region. The 869:, to become the primary target of the mission. 7639:. Applied Physics Laboratory. 28 August 2018. 7239: 7237: 6279: 5986: 5954: 5579: 5076: 5074: 4913: 4496:"The Hunt Is On for Moons Around Ultima Thule" 4489: 4487: 4485: 4483: 4406:. Applied Physics Laboratory. 12 November 2019 4249: 4162:"New- And Old-Style Minor Planet Designations" 3978: 3976: 3901:. Applied Physics Laboratory. 1 January 2019. 3876:. Applied Physics Laboratory. 1 January 2019. 3621: 3414: 3266: 3264: 3262: 2926: 2288:New Horizons § Kuiper belt object mission 2068:as it rotates. Though the rotation period and 1679:word for 'sky'; near homonym for 'snake' (see 1016: 805:36 km (22 mi) long, composed of two 161: 9835: 9572: 9558: 9503: 8740: 7900: 7708: 7461: 7416: 7390: 7317: 7294: 7218:. Applied Physics Laboratory. 4 August 2018. 6368: 6121: 5926: 5924: 5704: 5360: 5235:. Applied Physics Laboratory. 18 March 2019. 5183: 4751: 4749: 4015: 3676: 3301:"Orbit Fit and Astrometric record for 486958" 2844:5:14 UT, 16,700 km (10,400 mi) 2832:5:01 UT, 73,900 km (45,900 mi) 2527:On 10 July 2017, the airborne telescope 1484:on Arrokoth is sufficient for this to occur. 966:, while in classical and medieval literature 7599: 7116: 7114: 7112: 7110: 7108: 7106: 7077: 7075: 7073: 6947:. Applied Physics Laboratory. 11 July 2017. 6922:. Applied Physics Laboratory. 10 July 2017. 6788:. Applied Physics Laboratory. 19 July 2017. 6761:. Applied Physics Laboratory. Archived from 6744: 6563: 6561: 6484: 6482: 6398: 6337: 6220: 6066: 5977: 5869: 5838: 5132: 5130: 4574: 4572: 4570: 4568: 4566: 4564: 4562: 4560: 4558: 4556: 4554: 4552: 4550: 4548: 4546: 4544: 4542: 4540: 4538: 4536: 4461: 4459: 4303: 4250:Herrero, Nieves; Roseman, Sharon R. (2015). 4187: 4185: 3868:"New Horizons: First Images of Ultima Thule" 3743:"Colors of Trans-Neptunian Contact Binaries" 3731: 3369: 3367: 3320: 3318: 3235: 3233: 3231: 3229: 3227: 3225: 3223: 3221: 3095:'clouds'. He reconstructs these as the word 1642:the bright ring on the neck between the lobi 954:) is the northernmost location mentioned in 166:, glossed 'sky' but probably meaning 'cloud' 9517: 7386:. Applied Physics Laboratory. 26 June 2019. 7234: 7004: 6935: 6933: 6696: 6111:"Finally! New Horizons has a second target" 6040: 6038: 5662: 5660: 5615: 5613: 5435: 5433: 5431: 5315: 5313: 5071: 4950: 4948: 4946: 4944: 4942: 4838: 4836: 4834: 4671: 4669: 4534: 4532: 4530: 4528: 4526: 4524: 4522: 4520: 4518: 4516: 4480: 4154: 3982: 3973: 3947: 3945: 3889: 3887: 3365: 3363: 3361: 3359: 3357: 3355: 3353: 3351: 3349: 3347: 3259: 2647:—with and without background star omission 2635:New Horizons § Encounter with Arrokoth 2025: 1747: 1724:, its internal structure is expected to be 967: 933: 10476:Discoveries by the New Horizons KBO Search 9842: 9828: 9565: 9551: 9510: 9496: 8821:(lunar obiter, lander and rover; Jul 2019) 8747: 8733: 7907: 7893: 7830: 7470: 7451:"New Horizons: Ultima Thule is dead ahead" 7120: 6888: 6539: 6463: 6196: 6194: 6192: 6105: 5965: 5921: 5884:Minor Planet & Comet Ephemeris Service 4804: 4746: 4256:. Channel View Publications. p. 122. 3554: 3552: 3550: 3548: 3546: 3544: 3542: 3451: 3449: 3292: 3290: 1314:. Arrokoth's color is redder than that of 1068:team's naming citation was published in a 38: 10481:Discoveries by the Hubble Space Telescope 7264: 7124:New Horizons Kuiper Belt Extended Mission 7103: 7070: 7053: 7035: 6851: 6609: 6558: 6514: 6479: 6419: 6156: 5898: 5860: 5672: 5640: 5411: 5393: 5229:"A Prehistoric Puzzle in the Kuiper Belt" 5150: 5127: 5110: 5038: 4969: 4856: 4693: 4602: 4456: 4340: 4182: 3776: 3758: 3706: 3651: 3572: 3491: 3473: 3315: 3218: 3195: 3193: 3191: 3189: 2220: 10466:Contact binary (small Solar System body) 7751:): Most Distant Object Explored Up Close 7204: 7030:(2). American Astronomical Society: 72. 6963: 6930: 6908: 6722: 6702: 6253: 6035: 5987:Delsanti, Audrey; Jewitt, David (2006). 5853: 5657: 5610: 5558: 5428: 5310: 5251: 5018: 4939: 4887: 4831: 4666: 4513: 4431:Studies in Southeastern Indian Languages 4283: 4224: 4206: 4129: 3942: 3922: 3920: 3884: 3380:Journal of Geophysical Research: Planets 3344: 2680: 2658: 2638: 2595: 2515:three background stars. The team behind 2427:Results of the 2017 occultation campaign 2316:spacecraft to fly by. Scientists of the 2291: 2184: 1487:The smaller lobus, Weeyo, bears a large 1453: 1091: 1079: 998: 877:When Arrokoth was first observed by the 10501:Objects observed by stellar occultation 10456:Astronomical objects discovered in 2014 10446:Minor planet object articles (numbered) 6805: 6348: 6189: 5593:"New Views of Two-Lobed "Ultima Thule"" 5189: 4424: 4212: 4086: 3539: 3446: 3287: 3270: 2405:team combined data from Hubble and the 2109:to its orbit. Based on occultation and 1620:the smaller lobe, provisionally "Thule" 14: 10438: 7716:"LORRI Images from the Arrokoth Flyby" 7676:from the original on 28 December 2018. 7595:from the original on 7 September 2017. 7471:Lakdawalla, Emily (17 December 2018). 7243: 7178: 6703:Anderson, Paul Scott (8 August 2018). 6545: 6290: 5710: 5590: 5567:. Society for Science & the Public 5257: 4810: 4755: 4742:from the original on 13 February 2020. 4443: 3880:from the original on 14 November 2021. 3186: 2725:in the direction of the constellation 2386:, the second most feasible target for 1990:Arrokoth is generally classified as a 1177: 932:, was selected on 13 March 2018. 9823: 9546: 9491: 9426:(end of mission; Aug 2018 / Feb 2019) 8728: 8663:(enters interstellar space; Dec 2018) 8590:C/2018 V1 (Machholz-Fujikawa-Iwamoto) 7888: 7686: 7535:from the original on 19 November 2015 7448: 7422: 7396: 7013:"Probing the Hill Sphere of (486958) 6857: 6660:"Mission Support of the New Horizons 6657: 6488: 6200: 6117:from the original on 15 October 2014. 5989:"The Solar System Beyond The Planets" 5904: 5834:. USGS Astrogeology Research Program. 5816:. USGS Astrogeology Research Program. 5798:. USGS Astrogeology Research Program. 5780:. USGS Astrogeology Research Program. 5762:. USGS Astrogeology Research Program. 5531: 5482:from the original on 23 February 2019 4919: 4782: 4363: 3938:from the original on 6 November 2019. 3917: 2511:In June and July 2017, Arrokoth 1938:minimum orbital intersection distance 1710: 1007:Arrokoth was named for a word in the 369:Longitude of ascending node 44:Grayscale composite image of Arrokoth 9261:(first-ever light from bh-bh merger) 8807:(solar sail demonstration; Jun 2019) 7769:LORRI Images from the Arrokoth Flyby 7565:from the original on 1 November 2015 7505:from the original on 25 October 2015 7360:from the original on 7 November 2015 7277:Mikulski Archive for Space Telescope 7270: 5942:from the original on 5 February 2020 5713:"Commission F2 Annual Report (2019)" 5666: 4900:Society for Science & the Public 4890:"Ultima Thule may be a frankenworld" 4493: 4230: 4135: 4043: 4037: 3829:participating institution membership 2591: 2419: 1694:the large compaction crater on Weeyo 1458:The geology of Arrokoth, with comet 10486:Minor planets visited by spacecraft 10167:Venetia Burney Student Dust Counter 7643:from the original on 29 August 2018 7423:Chang, Kenneth (30 December 2018). 7397:Chang, Kenneth (31 December 2018). 6667:Encounter via Stellar Occultations" 6241:from the original on 1 January 2019 5994:. In Blonde, P.; Mason, J. (eds.). 5832:Gazetteer of Planetary Nomenclature 5814:Gazetteer of Planetary Nomenclature 5796:Gazetteer of Planetary Nomenclature 5778:Gazetteer of Planetary Nomenclature 5760:Gazetteer of Planetary Nomenclature 5190:Talbert, Tricia (18 October 2016). 4213:Talbert, Tricia (6 November 2017). 3905:from the original on 1 January 2019 2820:), 137,000 km (85,000 mi) 2542:AAS Division for Planetary Sciences 2204:, in which they slowed down due to 2155: 2148:, higher than the modeled range of 1448: 24: 10461:Cold classical Kuiper belt objects 7222:from the original on 4 August 2018 6926:from the original on 13 July 2017. 6792:from the original on 20 July 2017. 6080:. International Astronomical Union 5905:Davis, Jason (19 September 2018). 5722:. International Astronomical Union 5559:Grossman, Lisa (29 January 2019). 5239:from the original on 26 March 2019 4450:Proto-Algonquian Online Dictionary 4284:Gebhardt, Chris (2 January 2019). 4170:. International Astronomical Union 4087:Talbert, Tricia (28 August 2015). 3332:. International Astronomical Union 3247:. International Astronomical Union 2908:– Another minor planet visited by 2310:find a suitable Kuiper belt object 1524: 1510: 813:of about 298 years and a low 25: 10517: 9267:(first-ever "mass-gap" collision) 8754: 7914: 7737: 7687:Chang, Kenneth (2 January 2019). 7449:Stern, Allan (26 December 2018). 7281:Space Telescope Science Institute 7271:Buie, Marc W. (9 February 2018). 7244:Keeter, Bill (6 September 2018). 6951:from the original on 14 July 2017 6847:from the original on 9 July 2017. 6349:Bartels, Meghan (18 March 2019). 6261:"Arrokoth (2014 MU69) – In Depth" 6074:"List Of Trans-Neptunian Objects" 5382:The Astrophysical Journal Letters 5091:The Astrophysical Journal Letters 4783:Chang, Kenneth (3 January 2019). 4364:Ahmed, Issam (12 November 2019). 4123:Space Telescope Science Institute 4056:Space Telescope Science Institute 4031:Space Telescope Science Institute 3271:Talbert, Tricia (13 March 2018). 3118:), that syllable would have been 1452: 1366:gas that would interact with the 823:cold classical Kuiper belt object 10422: 10421: 10147:Long Range Reconnaissance Imager 10116: 9849: 9462: 9461: 9450: 9335: 9000: 8840: 8834: 8828: 8788: 8699: 8698: 8687: 8539: 8314: 8042: 8036: 8030: 7948: 7778:AstDyS-2, Asteroids—Dynamic Site 7753:at NASA Solar System Exploration 7442: 7372: 6858:Chang, Kenneth (8 August 2017). 6491:"Pluto-bound probe faces crisis" 6489:Witze, Alexandra (22 May 2014). 5591:Beatty, Kelly (4 January 2019). 5532:Stern, Alan (17 December 2021). 4920:Chang, Kenneth (18 March 2019). 4888:Grossman, Lisa (18 March 2019). 4811:Keeter, Bill (8 February 2019). 3296: 3168: 3021: 2987: 2940: 2885: 2864: 2849: 2837: 2825: 2805: 2793: 2781: 2769: 2497: 2485: 2451: 2442: 2433: 2046: 2034: 1794: 1756: 1302:Preliminary observations by the 1204: 1195: 1186: 985:International Astronomical Union 121: 7997:(solar space mission; Aug 2018) 6806:Talbert, Tricia (5 July 2017). 6291:Beatty, Kelly (19 March 2019). 5820: 5802: 5784: 5766: 5748: 4587:, a small Kuiper Belt object". 4437: 4418: 4357: 4243: 3860: 3835: 3793: 3523:The Shape and Pole of (486958) 3241:"(486958) Arrokoth = 2014 MU69" 3149: 3134: 3073: 3056: 3019:, and the hybrid pronunciation 2915:List of trans-Neptunian objects 2623:Division for Planetary Sciences 1056:team in a ceremony held at the 923: 6732:. Southwest Research Institute 6231:"Ultima Thule's First Mystery" 5998:. Springer. pp. 267–293. 5932:"KBO 2014 MU69 (Ultima Thule)" 4756:Keeter, Bill (3 August 2017). 4136:Wall, Mike (15 October 2014). 3934:. Applied Physics Laboratory. 3303:. Southwest Research Institute 2714:– SCET) at which point it was 2693:Having completed its flyby of 2628: 2276: 1326:of various simple organic and 1322:, which are produced from the 920:486958 on 12 March 2017. 821:, Arrokoth is classified as a 13: 1: 6978:American Astronomical Society 6546:Parker, Alex (28 June 2016). 6265:NASA Solar System Exploration 5744:. Sci-News. 16 February 2022. 5445:NASA Solar System Exploration 4494:Wall, Mike (4 January 2019). 3439:Lunar and Planetary Institute 3180: 3093:⟨arrahgwotuwss⟩ 2858:6,600 km (4,100 mi) 2620:American Astronomical Society 2197:formation of the Solar System 2020:formation of the Solar System 1165:to each other, likely due to 10240:Southwest Research Institute 9477:Category:2020 in outer space 9472:Category:2019 in outer space 9467:Category:2018 in outer space 7722:. Applied Physics Laboratory 6438:10.1016/j.icarus.2020.113824 6208:. Applied Physics Laboratory 6175:10.1016/j.icarus.2019.01.023 5540:. Applied Physics Laboratory 5169:10.1016/j.icarus.2020.114072 5057:10.1016/j.icarus.2020.113831 4429:. In Crawford, James (ed.). 4321:Geophysical Research Letters 4231:Wall, Mike (14 March 2018). 4058:. p. 23. Archived from 3717:10.1016/j.icarus.2019.01.025 3662:10.1016/j.icarus.2020.113723 2643:Arrokoth among the stars of 2584:By combining data about its 2281: 2180: 2004:classical Kuiper belt object 1064:on 8 November, and the 950: 7: 10225:Goddard Space Flight Center 8452:Hyperion proto-supercluster 7330:. Jet Propulsion Laboratory 2878: 2544:, on 20 October 2017. 2264:The long-term frequency of 2241:Chinese Academy of Sciences 1514:) which may have undergone 1227:Measurements of Arrokoth's 1132:flyby of Arrokoth, stellar 994: 881:in 2014, it was designated 436:Overall volume equivalent: 381:Argument of perihelion 10: 10522: 10215:Applied Physics Laboratory 4867:10.1038/s41550-020-01218-7 2755: 2632: 2285: 1414: 1172: 976:team nicknamed the larger 945: 205:Minor planet category 10419: 10384: 10328: 10258: 10230:Jet Propulsion Laboratory 10207: 10200: 10180: 10132: 10125: 10114: 10053: 9931: 9900: 9893: 9859: 9791: 9733: 9670: 9622: 9589: 9580: 9574:Small Solar System bodies 9525: 9445: 9384: 9333: 9214: 8996: 8884:Asteroid close approaches 8873: 8849: 8826: 8782: 8760: 8682: 8603: 8537: 8506: 8415: 8310: 8085:Asteroid close approaches 8074: 8051: 8028: 7942: 7920: 6628:10.1007/s11214-018-0507-4 6113:. The Planetary Society. 3808:Oxford English Dictionary 3205:Jet Propulsion Laboratory 3103:'clouds' (compare Ojibwa 2625:on 26 October 2018. 1573: 754: 733: 721: 685: 643: 604: 585: 564: 550: 529: 508: 483: 479:(assumed nominal density) 465: 453: 428: 397: 390: 378: 366: 356: 344: 329: 317:Orbital period (sidereal) 314: 304: 292: 282: 269: 259: 251: 239: 232: 202: 189:Ultima Thule (unofficial) 170: 151: 116: 104: 99: 91: 77: 54: 49: 37: 10471:Discoveries by Marc Buie 8801:(lunar lander; Feb 2019) 8636:(Mars landing; Oct 2018) 8433:MACS J1149 Lensed Star 1 7328:"HORIZONS Web-Interface" 7055:10.3847/1538-3881/aacdf8 7024:The Astronomical Journal 6988:. 504.06. Archived from 6604:(4). Springer Link: 23. 6267:. NASA. 19 December 2019 6012:10.1007/3-540-37683-6_11 5973:. The Planetary Society. 5413:10.3847/2041-8213/ab01db 5112:10.3847/2041-8213/ac044b 3843:"New Horizons Press Kit" 3778:10.3847/1538-3881/ab27bc 3747:The Astronomical Journal 3493:10.3847/1538-3881/ab6ced 3462:The Astronomical Journal 3203:(2014-10-22 last obs.). 3089:⟨arrokoth⟩ 2920: 2026:Rotation and temperature 1932:for its orbit to become 1748:Orbit and classification 1075: 736:Absolute magnitude 392:Physical characteristics 173:Alternative designations 9519:Minor planets navigator 8457:2MASS J18082002−5104378 7961:(lunar flyby; Apr 2018) 7827:JPL Small-Body Database 7475:. The Planetary Society 6896:. The Planetary Society 5909:. The Planetary Society 5447:. NASA. 24 January 2019 5280:10.1126/science.aba6889 4988:10.1126/science.aay3705 4712:10.1126/science.aay3999 4621:10.1126/science.aaw9771 4425:Siebert, Frank (1975). 3813:Oxford University Press 3591:10.1126/science.aay3999 3146:on 1 January 2019. 2938:is normally pronounced 2697:in July 2015, the 1985:JPL Small-Body Database 1561:In May 2020, the IAU's 1017: 899:provisional designation 889:probe was announced by 872: 765:provisional designation 532:Synodic rotation period 234:Orbital characteristics 162: 69:New Horizons KBO Search 10392:Hubble Space Telescope 10250:University of Colorado 9699:Trans-Neptunian object 9457:Outer space portal 9400:; Dec 2018 / Jan 2019) 8694:Outer space portal 8675:; Dec 2018 / Jan 2019) 7791:Observation prediction 7248:. NASA. Archived from 6810:. NASA. Archived from 5194:. NASA. Archived from 4815:. NASA. Archived from 4760:. NASA. Archived from 4091:. NASA. Archived from 2690: 2678: 2656: 2601: 2340:on 16 June 2014. 2338:Hubble Space Telescope 2305: 2302:Hubble Space Telescope 2221:Flattening and merging 2192: 2133:measurements from the 1996:trans-Neptunian object 1464: 1304:Hubble Space Telescope 1248:extending from red to 1109: 1089: 1086:geopotential elevation 1038:Hubble Space Telescope 1032:team to represent the 1004: 983:In November 2019, the 968: 934: 908:, was assigned by the 879:Hubble Space Telescope 841:Hubble Space Telescope 781:trans-Neptunian object 85:Hubble Space Telescope 9884:New Frontiers program 8585:C/2018 F4 (PanSTARRS) 6658:Young, Eliot (2016). 6598:Space Science Reviews 6473:The Planetary Society 6031:on 25 September 2007. 5323:The colors of 486958 4444:Hewson, John (2017). 2712:Spacecraft Event Time 2684: 2669: 2642: 2599: 2407:European Space Agency 2304:on 26 June 2014. 2295: 2202:streaming instability 2188: 2070:light curve amplitude 1980:uncertainty parameter 1828: 486958 Arrokoth 1778:(PT2) is in red, and 1609:word for 'sky, above' 1457: 1095: 1083: 1072:on 12 November. 1070:Minor Planet Circular 1046:Pamunkey Indian Tribe 1002: 775:; formerly nicknamed 503:0.155–0.600 g/cm 253:Uncertainty parameter 10410:Pluto Kuiper Express 9870:Exploration of Pluto 9672:Distant minor planet 9416:far side of the Moon 5969:(1 September 2015). 4342:10.1029/2022GL098406 4095:on 26 September 2015 3400:10.1029/2021JE007068 3326:"MPC – Orbit Sketch" 3085:Algonquian languages 2685:View of Arrokoth by 2653:20 to 15; late 2018) 2349:digitally processing 2300:images taken by the 2259:synchronous rotation 2245:Max Planck Institute 1992:distant minor planet 1942:Deep Ecliptic Survey 1918:orbital eccentricity 761:486958 Arrokoth 512:surface gravity 421:15.75 × 13.85 × 9.75 413:21.20 × 19.90 × 9.05 406:35.95 × 19.90 × 9.75 107:MPC designation 10506:2019 in spaceflight 10491:Named minor planets 10245:Stanford University 9366:138P/Shoemaker–Levy 9346:C/2018 Y1 (Iwamoto) 9271:J043947.08+163415.7 8714:2019 in outer space 8709:2018 in outer space 8704:2017 in outer space 8444:541132 Leleākūhonua 7878:Physical parameters 7311:2018DPS....5050906B 7137:on 26 December 2018 7046:2018AJ....156...72K 6986:2017DPS....4950406Y 6892:(24 January 2018). 6683:2016sofi.prop..168Y 6620:2018SSRv..214...77S 6583:2015EPSC...10..417S 6507:2014Natur.509..407W 6430:2021Icar..35613824M 6297:Sky & Telescope 6167:2017DPS....4950407B 6109:(15 October 2014). 6078:Minor Planet Center 6060:2015LPI....46.1301P 6004:2006ssu..book..267D 5996:Solar System Update 5810:"Kaʼan Arcus" 5651:2019LPI....50.1742S 5597:Sky & Telescope 5404:2019ApJ...872L...5G 5272:2020Sci...367..980J 5161:2021Icar..35614072L 5103:2021ApJ...914L..31M 5049:2021Icar..35613831L 4980:2020Sci...367.3705G 4819:on 16 December 2019 4704:2020Sci...367.3999S 4613:2019Sci...364.9771S 4474:Minor Planet Center 4333:2022GeoRL..4998406M 4290:NASASpaceFlight.com 4200:Minor Planet Center 4167:Minor Planet Center 4150:on 15 October 2014. 4047:(15 October 2014). 3997:Scientific American 3990:(17 January 2019). 3967:2019LPI....50.1611P 3811:(Online ed.). 3769:2019AJ....158...53T 3583:2020Sci...367.3999S 3484:2020AJ....159..130B 3392:2022JGRE..12707068K 3330:Minor Planet Center 3245:Minor Planet Center 3107:'cloud'), from the 2893:Solar System portal 2399:stellar occultation 2298:Wide Field Camera 3 2125:on the illuminated 1947:At the time of the 1924:to 46.4 AU at 1717:amorphous water ice 1570: 1534:mechanical strength 1470:geological features 1229:absorption spectrum 1178:Spectra and surface 1062:Minor Planet Center 918:minor planet number 910:Minor Planet Center 815:orbital inclination 92:Discovery date 79:Discovery site 34: 10376:Deep Space Network 9138:Proxima Centauri c 8655:arrival; Dec 2018) 8619:arrival; Jun 2018) 8580:38P/Stephan–Oterma 8560:C/2018 C2 (Lemmon) 8550:C/2017 T1 (Heinze) 7994:Parker Solar Probe 7815:Observational info 7694:The New York Times 7429:The New York Times 7403:The New York Times 6865:The New York Times 4964:(6481): eaay3705. 4926:The New York Times 4790:The New York Times 4764:on 4 December 2017 4125:. 15 October 2014. 3567:(6481): eaay3999. 2733:was 6 hours. 2691: 2679: 2657: 2651:apparent magnitude 2602: 2306: 2193: 1894:astronomical units 1789:(PT3) is in green. 1711:Internal structure 1697:The English word ' 1568: 1465: 1152:centrifugal forces 1110: 1090: 1088:across its surface 1028:was chosen by the 1005: 724:Apparent magnitude 265:2.33 yr (851 days) 56:Discovered by 32: 27:Kuiper belt object 10433: 10432: 10371: 10361: 10351: 10341: 10324: 10323: 10196: 10195: 10112: 10111: 9817: 9816: 9729: 9728: 9614:Meanings of names 9540: 9539: 9485: 9484: 9385:Space exploration 9356:168P/Hergenrother 8722: 8721: 8604:Space exploration 8575:64P/Swift–Gehrels 8387:(refuted in 2021) 7455:Sky and Telescope 7252:on 9 October 2018 7192:on 22 August 2018 6992:on 9 October 2018 6890:Lakdawalla, Emily 6841:The Outer Sanctum 6501:(7501): 407–408. 6465:Lakdawalla, Emily 6204:(8 August 2017). 6107:Lakdawalla, Emily 5967:Lakdawalla, Emily 5266:(6481): 980–981. 4597:(6441): aaw9771. 3827:(Subscription or 2667: 2592:2018 occultations 2420:2017 occultations 2162:natural satellite 2085:around 1.0–1.15. 1730:radioactive decay 1708: 1707: 1704:2 September 2021 1686:2 September 2021 1658:2 September 2021 1546:center of gravity 1538:Kaʼan Arcus 1265:organic compounds 1099:animation of two 1058:NASA Headquarters 1009:Powhatan language 758: 757: 681: 680: 403:Overall best fit: 112:(486958) Arrokoth 16:(Redirected from 10513: 10425: 10424: 10369: 10359: 10349: 10339: 10205: 10204: 10130: 10129: 10120: 10105: 10103: 10102: 10093: 10091: 10090: 10081: 10079: 10078: 10069: 10067: 10066: 10046: 10044: 10043: 10034: 10032: 10031: 10027:(556416) 2014 OE 10022: 10020: 10019: 10015:(516977) 2012 HZ 10010: 10008: 10007: 10003:(307261) 2002 MS 9968: 9966: 9965: 9956: 9954: 9953: 9898: 9897: 9844: 9837: 9830: 9821: 9820: 9587: 9586: 9567: 9560: 9553: 9544: 9543: 9512: 9505: 9498: 9489: 9488: 9465: 9464: 9455: 9454: 9453: 9434:(departure from 9414:(landing on the 9396:(encounter with 9339: 9230: 9228: 9227: 9162:Teegarden's Star 9158:i (hypothesized) 9004: 8989: 8987: 8986: 8977: 8975: 8974: 8965: 8963: 8962: 8948: 8946: 8945: 8921: 8919: 8918: 8909: 8907: 8906: 8897: 8895: 8894: 8859:Kamchatka meteor 8844: 8838: 8832: 8792: 8749: 8742: 8735: 8726: 8725: 8702: 8701: 8692: 8691: 8690: 8671:(encounter with 8543: 8488: 8485: 8483: 8482: 8471: 8469: 8468: 8448: 8439:moons of Jupiter 8392:EPIC 211945201 b 8388: 8384:Barnard's Star b 8318: 8303: 8301: 8300: 8296:(163899) 2003 SD 8291: 8289: 8288: 8279: 8277: 8276: 8267: 8265: 8264: 8255: 8253: 8252: 8243: 8241: 8240: 8231: 8229: 8228: 8219: 8217: 8216: 8202: 8200: 8199: 8190: 8188: 8187: 8183:(505657) 2014 SR 8178: 8176: 8175: 8171:(276033) 2002 AJ 8156: 8154: 8153: 8134: 8132: 8131: 8122: 8120: 8119: 8110: 8108: 8107: 8098: 8096: 8095: 8066:Kamchatka meteor 8046: 8040: 8034: 8019:(mission to the 7969:(mission to the 7952: 7909: 7902: 7895: 7886: 7885: 7870:Orbital elements 7834: 7763: 7757:About Arrokoth ( 7750: 7732: 7731: 7729: 7727: 7720:pluto.jhuapl.edu 7712: 7706: 7705: 7703: 7701: 7684: 7678: 7677: 7670:pluto.jhuapl.edu 7662: 7653: 7652: 7650: 7648: 7637:pluto.jhuapl.edu 7629: 7623: 7622: 7620: 7618: 7613:. 4 January 2019 7603: 7597: 7596: 7589:pluto.jhuapl.edu 7581: 7575: 7574: 7572: 7570: 7559:pluto.jhuapl.edu 7551: 7545: 7544: 7542: 7540: 7529:pluto.jhuapl.edu 7521: 7515: 7514: 7512: 7510: 7499:pluto.jhuapl.edu 7491: 7485: 7484: 7482: 7480: 7468: 7459: 7458: 7446: 7440: 7439: 7437: 7435: 7420: 7414: 7413: 7411: 7409: 7394: 7388: 7387: 7384:pluto.jhuapl.edu 7376: 7370: 7369: 7367: 7365: 7354:pluto.jhuapl.edu 7346: 7340: 7339: 7337: 7335: 7324: 7315: 7314: 7298: 7292: 7291: 7289: 7287: 7268: 7262: 7261: 7259: 7257: 7241: 7232: 7231: 7229: 7227: 7216:pluto.jhuapl.edu 7208: 7202: 7201: 7199: 7197: 7182: 7176: 7175: 7173: 7171: 7156: 7147: 7146: 7144: 7142: 7136: 7129: 7118: 7101: 7100: 7098: 7096: 7090: 7079: 7068: 7067: 7057: 7039: 7019: 7008: 7002: 7001: 6999: 6997: 6967: 6961: 6960: 6958: 6956: 6945:pluto.jhuapl.edu 6937: 6928: 6927: 6920:pluto.jhuapl.edu 6912: 6906: 6905: 6903: 6901: 6886: 6877: 6876: 6874: 6872: 6855: 6849: 6848: 6833: 6824: 6823: 6821: 6819: 6803: 6794: 6793: 6786:pluto.jhuapl.edu 6778: 6767: 6766: 6765:on 28 July 2017. 6759:pluto.jhuapl.edu 6751: 6742: 6741: 6739: 6737: 6726: 6720: 6719: 6717: 6715: 6700: 6694: 6693: 6691: 6689: 6666: 6655: 6640: 6639: 6613: 6593: 6587: 6586: 6576: 6565: 6556: 6555: 6543: 6537: 6536: 6518: 6486: 6477: 6476: 6467:(17 June 2014). 6461: 6450: 6449: 6423: 6402: 6396: 6395: 6393: 6391: 6377: 6366: 6365: 6363: 6361: 6346: 6335: 6334: 6332: 6327:("Ultima Thule") 6326: 6314: 6308: 6307: 6305: 6303: 6288: 6277: 6276: 6274: 6272: 6257: 6251: 6250: 6248: 6246: 6235:pluto.jhuapl.edu 6227: 6218: 6217: 6215: 6213: 6198: 6187: 6186: 6160: 6142: 6132: 6119: 6118: 6103: 6090: 6089: 6087: 6085: 6070: 6064: 6063: 6053: 6042: 6033: 6032: 6030: 6024:. Archived from 5993: 5984: 5975: 5974: 5963: 5952: 5951: 5949: 5947: 5928: 5919: 5918: 5916: 5914: 5902: 5896: 5895: 5893: 5891: 5876: 5867: 5866: 5864: 5851: 5836: 5835: 5824: 5818: 5817: 5806: 5800: 5799: 5788: 5782: 5781: 5770: 5764: 5763: 5752: 5746: 5745: 5738: 5732: 5731: 5729: 5727: 5717: 5708: 5702: 5701: 5699: 5688: 5679: 5678: 5676: 5664: 5655: 5654: 5644: 5634: 5629: 5617: 5608: 5607: 5605: 5603: 5588: 5577: 5576: 5574: 5572: 5556: 5550: 5549: 5547: 5545: 5538:pluto.jhuapl.edu 5529: 5520: 5519: 5517: 5506: 5495: 5494: 5489: 5487: 5476:pluto.jhuapl.edu 5468: 5457: 5456: 5454: 5452: 5437: 5426: 5425: 5415: 5397: 5373: 5358: 5357: 5355: 5344: 5338: 5337: 5335: 5329: 5317: 5308: 5307: 5255: 5249: 5248: 5246: 5244: 5233:pluto.jhuapl.edu 5225: 5208: 5207: 5205: 5203: 5187: 5181: 5180: 5154: 5134: 5125: 5124: 5114: 5078: 5069: 5068: 5042: 5022: 5016: 5015: 4973: 4952: 4937: 4936: 4934: 4932: 4917: 4911: 4910: 4908: 4906: 4885: 4879: 4878: 4860: 4845:Nature Astronomy 4840: 4829: 4828: 4826: 4824: 4808: 4802: 4801: 4799: 4797: 4780: 4774: 4773: 4771: 4769: 4753: 4744: 4743: 4697: 4673: 4664: 4663: 4661: 4650: 4641: 4640: 4606: 4586: 4576: 4511: 4510: 4508: 4506: 4491: 4478: 4477: 4471: 4463: 4454: 4453: 4441: 4435: 4434: 4422: 4416: 4415: 4413: 4411: 4404:pluto.jhuapl.edu 4396: 4383: 4382: 4380: 4378: 4361: 4355: 4354: 4344: 4312: 4301: 4300: 4298: 4296: 4281: 4268: 4267: 4247: 4241: 4240: 4228: 4222: 4221: 4210: 4204: 4203: 4197: 4189: 4180: 4179: 4177: 4175: 4158: 4152: 4151: 4146:. Archived from 4133: 4127: 4126: 4111: 4105: 4104: 4102: 4100: 4084: 4067: 4066: 4065:on 27 July 2015. 4064: 4053: 4041: 4035: 4034: 4019: 4013: 4012: 4010: 4008: 3980: 3971: 3970: 3960: 3949: 3940: 3939: 3932:pluto.jhuapl.edu 3928:"About Arrokoth" 3924: 3915: 3914: 3912: 3910: 3899:pluto.jhuapl.edu 3891: 3882: 3881: 3864: 3858: 3857: 3855: 3853: 3847: 3839: 3833: 3832: 3824: 3822: 3820: 3815:. September 2022 3804: 3797: 3791: 3790: 3780: 3762: 3738: 3729: 3728: 3710: 3692: 3683: 3674: 3673: 3655: 3634: 3619: 3618: 3576: 3556: 3537: 3536: 3534: 3529: 3517: 3506: 3505: 3495: 3477: 3453: 3444: 3442: 3441:. 21 March 2019. 3425: 3412: 3411: 3371: 3342: 3341: 3339: 3337: 3322: 3313: 3312: 3310: 3308: 3294: 3285: 3284: 3282: 3280: 3268: 3257: 3256: 3254: 3252: 3237: 3216: 3215: 3213: 3211: 3197: 3175: 3172: 3166: 3153: 3147: 3138: 3132: 3127: 3117: 3113: 3109:Proto-Algonquian 3106: 3102: 3099:'cloud', plural 3098: 3094: 3090: 3081:William Strachey 3077: 3071: 3069: 3060: 3054: 3049: 3044: 3043: 3040: 3039: 3036: 3033: 3030: 3027: 3015: 3010: 3009: 3006: 3005: 3002: 2999: 2996: 2993: 2977: 2968: 2963: 2962: 2959: 2958: 2955: 2952: 2949: 2946: 2933: 2895: 2890: 2889: 2888: 2868: 2859: 2853: 2841: 2829: 2809: 2797: 2785: 2773: 2720: 2676: 2668: 2654: 2607:science outreach 2501: 2489: 2455: 2446: 2437: 2385: 2383: 2382: 2369: 2367: 2366: 2355:, member of the 2326: 2273:bilobate shape. 2233:angular momentum 2172: 2168: 2156:Mass and density 2151: 2147: 2145: 2124: 2118:solar irradiance 2093:the approaching 2050: 2038: 1967: 1966: 1957: 1956: 1912: 1911: 1902: 1901: 1885: 1880: 1871: 1866: 1857: 1852: 1843: 1838: 1829: 1827: 1818: 1813: 1807: 1798: 1788: 1786: 1785: 1777: 1775: 1774: 1760: 1723: 1591: 1571: 1567: 1449:Surface features 1405:geometric albedo 1376: 1356:hydrogen cyanide 1344:hydrogen sulfide 1291: 1255:at 1.2–2.5 1237: 1208: 1199: 1190: 1107: 1020: 1013:Tidewater region 971: 960:Roman literature 953: 947: 939: 907: 896: 884: 868: 866: 865: 857: 855: 854: 773: 717: 715: 708: 706: 699: 645: 644: 634: 632: 621: 620: 619: 607:Geometric albedo 600: 598: 587:North pole 581: 579: 571: 566:North pole 560: 546: 541: 525: 520: 504: 495: 478: 476: 461: 449: 444: 439: 424: 422: 416: 414: 407: 352:0° 0 11.92 / day 186: 182:(486958) 2014 MU 165: 147: 146: 143: 142: 139: 136: 133: 130: 127: 87: 50:Discovery 42: 35: 31: 21: 10521: 10520: 10516: 10515: 10514: 10512: 10511: 10510: 10451:486958 Arrokoth 10436: 10435: 10434: 10429: 10415: 10380: 10320: 10266:Frances Bagenal 10254: 10192: 10176: 10121: 10108: 10100: 10099: 10096: 10088: 10087: 10084: 10076: 10075: 10072: 10064: 10063: 10060: 10049: 10041: 10040: 10037: 10029: 10028: 10025: 10017: 10016: 10013: 10005: 10004: 10001: 9963: 9962: 9959: 9951: 9950: 9947: 9927: 9923:486958 Arrokoth 9889: 9888: 9855: 9848: 9818: 9813: 9787: 9725: 9666: 9618: 9576: 9571: 9541: 9536: 9531:486958 Arrokoth 9521: 9516: 9486: 9481: 9451: 9449: 9441: 9398:486958 Arrokoth 9380: 9329: 9310:moons of Saturn 9225: 9224: 9221: 9210: 9017:Beta Pictoris c 8992: 8984: 8983: 8980: 8972: 8971: 8968: 8960: 8959: 8956: 8943: 8942: 8939: 8935:1620 Geographos 8916: 8915: 8912: 8904: 8903: 8900: 8892: 8891: 8888: 8869: 8845: 8839: 8833: 8824: 8785: 8778: 8775: 8769: 8756: 8753: 8723: 8718: 8688: 8686: 8678: 8673:486958 Arrokoth 8599: 8533: 8502: 8486: 8480: 8479: 8476: 8466: 8465: 8462: 8446: 8423:LSPM J0207+3331 8411: 8386: 8306: 8298: 8297: 8294: 8286: 8285: 8282: 8274: 8273: 8270: 8262: 8261: 8258: 8250: 8249: 8246: 8238: 8237: 8234: 8226: 8225: 8222: 8214: 8213: 8210: 8197: 8196: 8193: 8185: 8184: 8181: 8173: 8172: 8169: 8151: 8150: 8147: 8129: 8128: 8125: 8117: 8116: 8113: 8105: 8104: 8101: 8093: 8092: 8089: 8070: 8047: 8041: 8035: 8026: 7945: 7938: 7935: 7929: 7916: 7913: 7822:486958 Arrokoth 7807:Proper elements 7774:486958 Arrokoth 7762: 7758: 7749: 7745: 7740: 7735: 7725: 7723: 7714: 7713: 7709: 7699: 7697: 7685: 7681: 7664: 7663: 7656: 7646: 7644: 7631: 7630: 7626: 7616: 7614: 7605: 7604: 7600: 7583: 7582: 7578: 7568: 7566: 7553: 7552: 7548: 7538: 7536: 7523: 7522: 7518: 7508: 7506: 7493: 7492: 7488: 7478: 7476: 7469: 7462: 7447: 7443: 7433: 7431: 7421: 7417: 7407: 7405: 7395: 7391: 7378: 7377: 7373: 7363: 7361: 7348: 7347: 7343: 7333: 7331: 7326: 7325: 7318: 7299: 7295: 7285: 7283: 7269: 7265: 7255: 7253: 7242: 7235: 7225: 7223: 7210: 7209: 7205: 7195: 7193: 7184: 7183: 7179: 7169: 7167: 7166:. 2 August 2018 7158: 7157: 7150: 7140: 7138: 7134: 7127: 7119: 7104: 7094: 7092: 7088: 7080: 7071: 7018: 7014: 7009: 7005: 6995: 6993: 6968: 6964: 6954: 6952: 6939: 6938: 6931: 6914: 6913: 6909: 6899: 6897: 6887: 6880: 6870: 6868: 6856: 6852: 6843:. 7 July 2017. 6835: 6834: 6827: 6817: 6815: 6814:on 21 July 2017 6804: 6797: 6780: 6779: 6770: 6753: 6752: 6745: 6735: 6733: 6728: 6727: 6723: 6713: 6711: 6701: 6697: 6687: 6685: 6665: 6661: 6656: 6643: 6594: 6590: 6574: 6566: 6559: 6544: 6540: 6516:10.1038/509407a 6487: 6480: 6462: 6453: 6403: 6399: 6389: 6387: 6378: 6369: 6359: 6357: 6347: 6338: 6330: 6325: 6321: 6315: 6311: 6301: 6299: 6289: 6280: 6270: 6268: 6259: 6258: 6254: 6244: 6242: 6229: 6228: 6221: 6211: 6209: 6199: 6190: 6141: 6137: 6133: 6122: 6104: 6093: 6083: 6081: 6072: 6071: 6067: 6051: 6043: 6036: 6028: 6022: 5991: 5985: 5978: 5964: 5955: 5945: 5943: 5930: 5929: 5922: 5912: 5910: 5903: 5899: 5889: 5887: 5878: 5877: 5870: 5852: 5839: 5826: 5825: 5821: 5808: 5807: 5803: 5790: 5789: 5785: 5772: 5771: 5767: 5754: 5753: 5749: 5740: 5739: 5735: 5725: 5723: 5715: 5709: 5705: 5697: 5689: 5682: 5665: 5658: 5632: 5628: 5624: 5618: 5611: 5601: 5599: 5589: 5580: 5570: 5568: 5557: 5553: 5543: 5541: 5530: 5523: 5515: 5507: 5498: 5485: 5483: 5470: 5469: 5460: 5450: 5448: 5439: 5438: 5429: 5374: 5361: 5353: 5345: 5341: 5333: 5328: 5324: 5318: 5311: 5256: 5252: 5242: 5240: 5227: 5226: 5211: 5201: 5199: 5198:on 17 June 2019 5188: 5184: 5135: 5128: 5086: 5079: 5072: 5023: 5019: 4953: 4940: 4930: 4928: 4918: 4914: 4904: 4902: 4886: 4882: 4841: 4832: 4822: 4820: 4809: 4805: 4795: 4793: 4781: 4777: 4767: 4765: 4754: 4747: 4674: 4667: 4659: 4651: 4644: 4585: 4581: 4577: 4514: 4504: 4502: 4492: 4481: 4469: 4467:"M.P.C. 118222" 4465: 4464: 4457: 4442: 4438: 4423: 4419: 4409: 4407: 4398: 4397: 4386: 4376: 4374: 4362: 4358: 4313: 4304: 4294: 4292: 4282: 4271: 4264: 4248: 4244: 4229: 4225: 4211: 4207: 4195: 4193:"M.P.C. 103886" 4191: 4190: 4183: 4173: 4171: 4160: 4159: 4155: 4134: 4130: 4113: 4112: 4108: 4098: 4096: 4085: 4070: 4062: 4051: 4042: 4038: 4021: 4020: 4016: 4006: 4004: 4002:Springer Nature 3981: 3974: 3958: 3950: 3943: 3926: 3925: 3918: 3908: 3906: 3893: 3892: 3885: 3866: 3865: 3861: 3851: 3849: 3845: 3841: 3840: 3836: 3826: 3818: 3816: 3798: 3794: 3739: 3732: 3691: 3687: 3684: 3677: 3635: 3622: 3557: 3540: 3532: 3528: 3524: 3518: 3509: 3454: 3447: 3427: 3426: 3415: 3372: 3345: 3335: 3333: 3324: 3323: 3316: 3306: 3304: 3295: 3288: 3278: 3276: 3269: 3260: 3250: 3248: 3239: 3238: 3219: 3209: 3207: 3199: 3198: 3187: 3183: 3178: 3173: 3169: 3154: 3150: 3139: 3135: 3125: 3092: 3088: 3078: 3074: 3068: 3064: 3061: 3057: 3047: 3024: 3020: 3013: 2990: 2986: 2975: 2966: 2943: 2939: 2934: 2927: 2923: 2891: 2886: 2884: 2881: 2876: 2875: 2874: 2873: 2872: 2869: 2861: 2860: 2857: 2854: 2846: 2845: 2842: 2834: 2833: 2830: 2822: 2821: 2810: 2802: 2801: 2798: 2790: 2789: 2786: 2778: 2777: 2774: 2765: 2764: 2758: 2715: 2674: 2659: 2648: 2637: 2631: 2594: 2509: 2508: 2507: 2506: 2505: 2502: 2494: 2493: 2490: 2481: 2480: 2474: 2473: 2472: 2471: 2458: 2457: 2456: 2448: 2447: 2439: 2438: 2429: 2428: 2422: 2380: 2379: 2376: 2364: 2363: 2360: 2324: 2290: 2284: 2279: 2223: 2191: 2183: 2170: 2166: 2158: 2149: 2143: 2141: 2122: 2058: 2057: 2056: 2055: 2054: 2051: 2043: 2042: 2039: 2028: 1976:observation arc 1964: 1962: 1954: 1952: 1909: 1907: 1899: 1897: 1890: 1889: 1888: 1887: 1886: 1878: 1877: 1864: 1863: 1850: 1849: 1836: 1835: 1825: 1824: 1811: 1810: 1809: 1805: 1799: 1791: 1790: 1783: 1782: 1779: 1772: 1771: 1768: 1761: 1750: 1721: 1713: 1585: 1584: 1569:Named features 1496:be remnants of 1482:surface gravity 1466: 1451: 1417: 1389:Spectral images 1374: 1360:photoionization 1289: 1284: 1269:absorption band 1235: 1225: 1224: 1223: 1222: 1211: 1210: 1209: 1201: 1200: 1192: 1191: 1180: 1175: 1163:mutually locked 1159:rotational axis 1105: 1078: 997: 926: 906: 902: 897:. Its official 894: 882: 875: 863: 862: 859: 852: 851: 848: 783:located in the 772: 768: 750: 741: 726: 713: 711: 709: 704: 702: 700: 697: 690: 630: 628: 627: 617: 615: 614: 612: 609: 596: 594: 591: 577: 575: 572: 569:right ascension 567: 558: 555: 539: 537: 534: 523: 521: 518: 514: 502: 497: 494:0.235 g/cm 493: 489: 474: 472: 459: 447: 445: 442: 440: 437: 433: 420: 418: 417: 412: 410: 409: 405: 404: 383: 371: 349: 334: 319: 297: 295:Semi-major axis 261:Observation arc 243:27 April 2019 ( 228: 207: 198: 185: 181: 175: 154: 124: 120: 109: 83: 73: 45: 33:486958 Arrokoth 28: 23: 22: 15: 12: 11: 5: 10519: 10509: 10508: 10503: 10498: 10493: 10488: 10483: 10478: 10473: 10468: 10463: 10458: 10453: 10448: 10431: 10430: 10420: 10417: 10416: 10414: 10413: 10406: 10403:New Horizons 2 10399: 10394: 10388: 10386: 10382: 10381: 10379: 10378: 10373: 10363: 10353: 10343: 10340:launch vehicle 10332: 10330: 10326: 10325: 10322: 10321: 10319: 10318: 10313: 10308: 10306:Mark Showalter 10303: 10301:Daniel Sarokon 10298: 10293: 10288: 10283: 10278: 10273: 10271:Richard Binzel 10268: 10262: 10260: 10256: 10255: 10253: 10252: 10247: 10242: 10237: 10232: 10227: 10222: 10220:Ball Aerospace 10217: 10211: 10209: 10202: 10198: 10197: 10194: 10193: 10191: 10190: 10184: 10182: 10178: 10177: 10175: 10174: 10169: 10164: 10159: 10154: 10149: 10144: 10138: 10136: 10127: 10123: 10122: 10115: 10113: 10110: 10109: 10107: 10106: 10094: 10082: 10070: 10057: 10055: 10051: 10050: 10048: 10047: 10035: 10023: 10011: 9999: 9994: 9989: 9984: 9979: 9974: 9969: 9957: 9945: 9935: 9933: 9929: 9928: 9926: 9925: 9920: 9915: 9910: 9904: 9902: 9895: 9891: 9890: 9887: 9886: 9881: 9872: 9867: 9861: 9860: 9857: 9856: 9847: 9846: 9839: 9832: 9824: 9815: 9814: 9812: 9811: 9806: 9801: 9795: 9793: 9789: 9788: 9786: 9785: 9780: 9775: 9773:Near-parabolic 9770: 9765: 9760: 9755: 9750: 9745: 9739: 9737: 9731: 9730: 9727: 9726: 9724: 9723: 9722: 9721: 9719:Scattered disc 9716: 9711: 9706: 9696: 9691: 9690: 9689: 9687:Neptune trojan 9684: 9676: 9674: 9668: 9667: 9665: 9664: 9662:Spectral types 9659: 9654: 9652:Jupiter trojan 9649: 9644: 9639: 9634: 9628: 9626: 9620: 9619: 9617: 9616: 9611: 9606: 9601: 9596: 9590: 9584: 9578: 9577: 9570: 9569: 9562: 9555: 9547: 9538: 9537: 9535: 9534: 9526: 9523: 9522: 9515: 9514: 9507: 9500: 9492: 9483: 9482: 9480: 9479: 9459: 9446: 9443: 9442: 9440: 9439: 9427: 9419: 9401: 9388: 9386: 9382: 9381: 9379: 9378: 9373: 9368: 9363: 9358: 9353: 9348: 9342: 9340: 9331: 9330: 9328: 9327: 9322: 9312: 9306: 9301: 9296: 9294:PSR J0740+6620 9291: 9288:PSR J0030+0451 9285: 9279: 9273: 9268: 9262: 9256: 9251: 9249:EPIC 204376071 9246: 9241: 9236: 9231: 9218: 9216: 9212: 9211: 9209: 9208: 9207: 9206: 9203: 9195: 9194: 9193: 9190: 9187: 9184: 9176: 9175: 9174: 9169: 9159: 9153: 9152: 9151: 9148: 9140: 9135: 9130: 9129: 9128: 9125: 9117: 9111: 9105: 9104: 9103: 9100: 9097: 9089: 9084: 9078: 9073: 9067: 9061: 9055: 9049: 9048: 9047: 9044: 9036: 9031: 9025: 9019: 9014: 9007: 9005: 8994: 8993: 8991: 8990: 8978: 8966: 8954: 8952:2100 Ra-Shalom 8949: 8937: 8932: 8927: 8922: 8910: 8898: 8886: 8880: 8878: 8871: 8870: 8868: 8867: 8862: 8855: 8853: 8847: 8846: 8827: 8825: 8823: 8822: 8808: 8802: 8795: 8793: 8780: 8779: 8777: 8776: 8770: 8764: 8761: 8758: 8757: 8752: 8751: 8744: 8737: 8729: 8720: 8719: 8717: 8716: 8696: 8683: 8680: 8679: 8677: 8676: 8664: 8656: 8646: 8637: 8629: 8620: 8607: 8605: 8601: 8600: 8598: 8597: 8592: 8587: 8582: 8577: 8572: 8567: 8562: 8557: 8552: 8546: 8544: 8535: 8534: 8532: 8531: 8525: 8524:(Nova Carinae) 8519: 8512: 8510: 8504: 8503: 8501: 8500: 8495: 8490: 8473: 8459: 8454: 8449: 8441: 8435: 8430: 8425: 8419: 8417: 8413: 8412: 8410: 8409: 8404: 8399: 8394: 8389: 8381: 8376: 8371: 8366: 8361: 8356: 8351: 8346: 8341: 8336: 8334:Kepler-1625b I 8327: 8321: 8319: 8308: 8307: 8305: 8304: 8292: 8280: 8268: 8256: 8244: 8232: 8220: 8208: 8203: 8191: 8179: 8167: 8162: 8157: 8145: 8140: 8135: 8123: 8111: 8099: 8087: 8081: 8079: 8072: 8071: 8069: 8068: 8063: 8057: 8055: 8049: 8048: 8029: 8027: 8025: 8024: 8010: 7998: 7990: 7974: 7962: 7955: 7953: 7940: 7939: 7937: 7936: 7930: 7924: 7921: 7918: 7917: 7912: 7911: 7904: 7897: 7889: 7883: 7882: 7881: 7880: 7838:Close approach 7819: 7818: 7817: 7771: 7766: 7760: 7754: 7747: 7739: 7738:External links 7736: 7734: 7733: 7707: 7679: 7654: 7624: 7598: 7576: 7546: 7516: 7486: 7460: 7441: 7415: 7389: 7371: 7341: 7316: 7293: 7263: 7233: 7203: 7177: 7148: 7102: 7069: 7016: 7003: 6962: 6929: 6907: 6878: 6850: 6825: 6795: 6768: 6743: 6721: 6695: 6671:SOFIA Proposal 6663: 6641: 6588: 6557: 6552:blogs.nasa.gov 6538: 6478: 6451: 6397: 6367: 6336: 6323: 6309: 6278: 6252: 6219: 6188: 6139: 6120: 6091: 6065: 6034: 6020: 5976: 5953: 5920: 5897: 5868: 5837: 5819: 5801: 5783: 5765: 5747: 5733: 5703: 5680: 5656: 5626: 5609: 5578: 5551: 5521: 5496: 5458: 5427: 5359: 5339: 5326: 5309: 5250: 5209: 5182: 5126: 5084: 5070: 5017: 4938: 4912: 4880: 4851:(2): 139–144. 4830: 4803: 4775: 4745: 4665: 4642: 4583: 4512: 4479: 4455: 4446:"*aᐧlaxkwatwi" 4436: 4417: 4384: 4356: 4302: 4269: 4262: 4242: 4223: 4205: 4181: 4153: 4128: 4106: 4068: 4036: 4033:. 1 July 2014. 4014: 3972: 3941: 3916: 3883: 3859: 3834: 3792: 3730: 3689: 3675: 3620: 3538: 3526: 3507: 3445: 3413: 3343: 3314: 3286: 3258: 3217: 3184: 3182: 3179: 3177: 3176: 3167: 3165:uncertainties. 3148: 3133: 3072: 3066: 3055: 2924: 2922: 2919: 2918: 2917: 2912: 2903: 2897: 2896: 2880: 2877: 2870: 2863: 2862: 2856:5:27 UT, 2855: 2848: 2847: 2843: 2836: 2835: 2831: 2824: 2823: 2811: 2804: 2803: 2799: 2792: 2791: 2787: 2780: 2779: 2775: 2768: 2767: 2766: 2762: 2761: 2760: 2759: 2757: 2754: 2630: 2627: 2593: 2590: 2503: 2496: 2495: 2491: 2484: 2483: 2482: 2478: 2477: 2476: 2475: 2460: 2459: 2450: 2449: 2441: 2440: 2432: 2431: 2430: 2426: 2425: 2424: 2423: 2421: 2418: 2283: 2280: 2278: 2275: 2222: 2219: 2189: 2182: 2179: 2167:0.29 g/cm 2157: 2154: 2127:subsolar point 2052: 2045: 2044: 2040: 2033: 2032: 2031: 2030: 2029: 2027: 2024: 1961: km; 4.02 1936:. (Arrokoth's 1906: km; 4.15 1800: 1793: 1792: 1763:The orbits of 1762: 1755: 1754: 1753: 1752: 1751: 1749: 1746: 1712: 1709: 1706: 1705: 1702: 1695: 1692: 1688: 1687: 1684: 1670: 1667: 1660: 1659: 1656: 1655:word for 'sky' 1643: 1640: 1636: 1635: 1634:11 April 2022 1632: 1631:word for 'sky' 1621: 1618: 1614: 1613: 1612:11 April 2022 1610: 1600: 1597: 1593: 1592: 1581: 1578: 1575: 1450: 1447: 1426:orbital speeds 1416: 1413: 1287: 1281:macromolecules 1246:spectral slope 1213: 1212: 1203: 1202: 1194: 1193: 1185: 1184: 1183: 1182: 1181: 1179: 1176: 1174: 1171: 1077: 1074: 996: 993: 925: 922: 904: 874: 871: 811:orbital period 803:contact binary 770: 756: 755: 752: 751: 744: 742: 734: 731: 730: 727: 722: 719: 718: 691: 686: 683: 682: 679: 678: 675: 672: 666: 662: 661: 658: 655: 652: 641: 640: 610: 605: 602: 601: 592: 586: 583: 582: 573: 565: 562: 561: 556: 551: 548: 547: 535: 530: 527: 526: 524:0.001 m/s 515: 509: 506: 505: 490: 484: 481: 480: 469: 463: 462: 457: 451: 450: 434: 429: 426: 425: 401: 395: 394: 388: 387: 384: 379: 376: 375: 372: 367: 364: 363: 360: 354: 353: 350: 345: 342: 341: 335: 330: 327: 326: 320: 315: 312: 311: 308: 302: 301: 298: 293: 290: 289: 286: 280: 279: 273: 267: 266: 263: 257: 256: 249: 248: 237: 236: 230: 229: 227: 226: 221: 216: 210: 208: 203: 200: 199: 197: 196: 193: 190: 187: 183: 178: 176: 171: 168: 167: 155: 152: 149: 148: 118: 114: 113: 110: 105: 102: 101: 97: 96: 93: 89: 88: 81: 75: 74: 72: 71: 66: 60: 58: 52: 51: 47: 46: 43: 26: 9: 6: 4: 3: 2: 10518: 10507: 10504: 10502: 10499: 10497: 10494: 10492: 10489: 10487: 10484: 10482: 10479: 10477: 10474: 10472: 10469: 10467: 10464: 10462: 10459: 10457: 10454: 10452: 10449: 10447: 10444: 10443: 10441: 10428: 10418: 10412: 10411: 10407: 10405: 10404: 10400: 10398: 10395: 10393: 10390: 10389: 10387: 10383: 10377: 10374: 10367: 10364: 10357: 10354: 10347: 10344: 10337: 10334: 10333: 10331: 10327: 10317: 10314: 10312: 10309: 10307: 10304: 10302: 10299: 10297: 10294: 10292: 10289: 10287: 10286:Lisa Hardaway 10284: 10282: 10279: 10277: 10274: 10272: 10269: 10267: 10264: 10263: 10261: 10257: 10251: 10248: 10246: 10243: 10241: 10238: 10236: 10233: 10231: 10228: 10226: 10223: 10221: 10218: 10216: 10213: 10212: 10210: 10206: 10203: 10199: 10189: 10186: 10185: 10183: 10179: 10173: 10170: 10168: 10165: 10163: 10160: 10158: 10155: 10153: 10150: 10148: 10145: 10143: 10140: 10139: 10137: 10135: 10131: 10128: 10124: 10119: 10104: 10095: 10092: 10083: 10080: 10071: 10068: 10059: 10058: 10056: 10052: 10045: 10036: 10033: 10024: 10021: 10012: 10009: 10000: 9998: 9995: 9993: 9990: 9988: 9985: 9983: 9980: 9978: 9975: 9973: 9970: 9967: 9958: 9955: 9946: 9944: 9940: 9937: 9936: 9934: 9930: 9924: 9921: 9919: 9916: 9914: 9911: 9909: 9906: 9905: 9903: 9899: 9896: 9892: 9885: 9882: 9880: 9878: 9873: 9871: 9868: 9866: 9863: 9862: 9858: 9854: 9853: 9845: 9840: 9838: 9833: 9831: 9826: 9825: 9822: 9810: 9807: 9805: 9802: 9800: 9797: 9796: 9794: 9790: 9784: 9781: 9779: 9776: 9774: 9771: 9769: 9766: 9764: 9761: 9759: 9756: 9754: 9751: 9749: 9746: 9744: 9741: 9740: 9738: 9736: 9732: 9720: 9717: 9715: 9712: 9710: 9707: 9705: 9702: 9701: 9700: 9697: 9695: 9692: 9688: 9685: 9683: 9680: 9679: 9678: 9677: 9675: 9673: 9669: 9663: 9660: 9658: 9655: 9653: 9650: 9648: 9645: 9643: 9642:Asteroid belt 9640: 9638: 9637:Aten asteroid 9635: 9633: 9630: 9629: 9627: 9625: 9621: 9615: 9612: 9610: 9607: 9605: 9602: 9600: 9597: 9595: 9592: 9591: 9588: 9585: 9583: 9582:Minor planets 9579: 9575: 9568: 9563: 9561: 9556: 9554: 9549: 9548: 9545: 9533: 9532: 9528: 9527: 9524: 9520: 9513: 9508: 9506: 9501: 9499: 9494: 9493: 9490: 9478: 9474: 9473: 9468: 9460: 9458: 9448: 9447: 9444: 9437: 9433: 9432: 9428: 9425: 9424: 9420: 9417: 9413: 9412: 9407: 9406: 9402: 9399: 9395: 9394: 9390: 9389: 9387: 9383: 9377: 9376:289P/Blanpain 9374: 9372: 9369: 9367: 9364: 9362: 9359: 9357: 9354: 9352: 9349: 9347: 9344: 9343: 9341: 9338: 9332: 9326: 9325:WD J0914+1914 9323: 9320: 9317:detection of 9316: 9313: 9311: 9307: 9305: 9302: 9300: 9297: 9295: 9292: 9289: 9286: 9283: 9280: 9277: 9274: 9272: 9269: 9266: 9263: 9260: 9257: 9255: 9252: 9250: 9247: 9245: 9242: 9240: 9237: 9235: 9232: 9229: 9220: 9219: 9217: 9213: 9204: 9201: 9200: 9199: 9196: 9191: 9188: 9185: 9182: 9181: 9180: 9177: 9173: 9170: 9168: 9165: 9164: 9163: 9160: 9157: 9154: 9149: 9146: 9145: 9144: 9141: 9139: 9136: 9134: 9131: 9126: 9123: 9122: 9121: 9120:Luyten's Star 9118: 9115: 9112: 9109: 9106: 9101: 9098: 9095: 9094: 9093: 9090: 9088: 9085: 9082: 9079: 9077: 9074: 9071: 9068: 9065: 9062: 9059: 9056: 9053: 9050: 9045: 9042: 9041: 9040: 9037: 9035: 9032: 9029: 9026: 9023: 9020: 9018: 9015: 9012: 9009: 9008: 9006: 9003: 8999: 8995: 8988: 8979: 8976: 8967: 8964: 8955: 8953: 8950: 8947: 8938: 8936: 8933: 8931: 8928: 8926: 8923: 8920: 8911: 8908: 8899: 8896: 8887: 8885: 8882: 8881: 8879: 8877: 8872: 8866: 8863: 8860: 8857: 8856: 8854: 8852: 8851:Impact events 8848: 8843: 8837: 8831: 8820: 8816: 8812: 8811:Chandrayaan-2 8809: 8806: 8803: 8800: 8797: 8796: 8794: 8791: 8787: 8781: 8773: 8768: 8763: 8762: 8759: 8755:2019 in space 8750: 8745: 8743: 8738: 8736: 8731: 8730: 8727: 8715: 8711: 8710: 8705: 8697: 8695: 8685: 8684: 8681: 8674: 8670: 8669: 8665: 8662: 8661: 8657: 8654: 8650: 8647: 8644: 8642: 8638: 8635: 8634: 8630: 8627: 8625: 8621: 8618: 8614: 8613: 8609: 8608: 8606: 8602: 8596: 8593: 8591: 8588: 8586: 8583: 8581: 8578: 8576: 8573: 8571: 8568: 8566: 8563: 8561: 8558: 8556: 8553: 8551: 8548: 8547: 8545: 8542: 8536: 8530:(Nova Persei) 8529: 8526: 8523: 8520: 8518:(Nova Muscae) 8517: 8514: 8513: 8511: 8509: 8505: 8499: 8496: 8494: 8491: 8484: 8474: 8470: 8460: 8458: 8455: 8453: 8450: 8445: 8442: 8440: 8436: 8434: 8431: 8429: 8426: 8424: 8421: 8420: 8418: 8414: 8408: 8405: 8403: 8400: 8398: 8395: 8393: 8390: 8385: 8382: 8380: 8377: 8375: 8372: 8370: 8367: 8365: 8362: 8360: 8357: 8355: 8352: 8350: 8347: 8345: 8342: 8340: 8337: 8335: 8332: 8328: 8326: 8325:Gliese 1132 c 8323: 8322: 8320: 8317: 8313: 8309: 8302: 8293: 8290: 8281: 8278: 8269: 8266: 8257: 8254: 8245: 8242: 8233: 8230: 8221: 8218: 8209: 8207: 8204: 8201: 8192: 8189: 8180: 8177: 8168: 8166: 8163: 8161: 8158: 8155: 8146: 8144: 8141: 8139: 8136: 8133: 8124: 8121: 8112: 8109: 8100: 8097: 8088: 8086: 8083: 8082: 8080: 8078: 8073: 8067: 8064: 8062: 8059: 8058: 8056: 8054: 8053:Impact events 8050: 8045: 8039: 8033: 8022: 8018: 8014: 8011: 8008: 8004: 8003: 7999: 7996: 7995: 7991: 7988: 7984: 7983:Mars Cube One 7980: 7979: 7975: 7972: 7968: 7967: 7963: 7960: 7957: 7956: 7954: 7951: 7947: 7941: 7933: 7928: 7923: 7922: 7919: 7915:2018 in space 7910: 7905: 7903: 7898: 7896: 7891: 7890: 7887: 7879: 7875: 7871: 7867: 7863: 7862:Orbit diagram 7859: 7855: 7851: 7847: 7843: 7839: 7836: 7835: 7833: 7829: 7828: 7823: 7820: 7816: 7812: 7808: 7804: 7800: 7796: 7792: 7788: 7784: 7781: 7780: 7779: 7775: 7772: 7770: 7767: 7765: 7755: 7752: 7742: 7741: 7721: 7717: 7711: 7696: 7695: 7690: 7683: 7675: 7671: 7667: 7661: 7659: 7642: 7638: 7634: 7628: 7612: 7608: 7602: 7594: 7590: 7586: 7580: 7564: 7560: 7556: 7550: 7534: 7530: 7526: 7520: 7504: 7500: 7496: 7490: 7474: 7467: 7465: 7456: 7452: 7445: 7430: 7426: 7419: 7404: 7400: 7393: 7385: 7381: 7375: 7359: 7355: 7351: 7345: 7329: 7323: 7321: 7312: 7308: 7304: 7297: 7282: 7278: 7274: 7267: 7251: 7247: 7240: 7238: 7221: 7217: 7213: 7207: 7191: 7187: 7181: 7165: 7161: 7155: 7153: 7133: 7126: 7125: 7117: 7115: 7113: 7111: 7109: 7107: 7087: 7086: 7078: 7076: 7074: 7065: 7061: 7056: 7051: 7047: 7043: 7038: 7033: 7029: 7025: 7021: 7007: 6991: 6987: 6983: 6979: 6975: 6974: 6966: 6950: 6946: 6942: 6936: 6934: 6925: 6921: 6917: 6911: 6895: 6891: 6885: 6883: 6867: 6866: 6861: 6854: 6846: 6842: 6838: 6832: 6830: 6813: 6809: 6802: 6800: 6791: 6787: 6783: 6777: 6775: 6773: 6764: 6760: 6756: 6755:"KBO Chasers" 6750: 6748: 6731: 6725: 6710: 6706: 6699: 6684: 6680: 6676: 6672: 6668: 6654: 6652: 6650: 6648: 6646: 6637: 6633: 6629: 6625: 6621: 6617: 6612: 6607: 6603: 6599: 6592: 6584: 6580: 6573: 6572: 6564: 6562: 6553: 6549: 6542: 6534: 6530: 6526: 6522: 6517: 6512: 6508: 6504: 6500: 6496: 6492: 6485: 6483: 6474: 6470: 6466: 6460: 6458: 6456: 6447: 6443: 6439: 6435: 6431: 6427: 6422: 6417: 6413: 6409: 6401: 6385: 6384: 6376: 6374: 6372: 6356: 6352: 6345: 6343: 6341: 6329: 6328: 6313: 6298: 6294: 6287: 6285: 6283: 6266: 6262: 6256: 6240: 6236: 6232: 6226: 6224: 6207: 6203: 6197: 6195: 6193: 6184: 6180: 6176: 6172: 6168: 6164: 6159: 6154: 6150: 6146: 6131: 6129: 6127: 6125: 6116: 6112: 6108: 6102: 6100: 6098: 6096: 6079: 6075: 6069: 6061: 6057: 6050: 6049: 6041: 6039: 6027: 6023: 6021:3-540-26056-0 6017: 6013: 6009: 6005: 6001: 5997: 5990: 5983: 5981: 5972: 5968: 5962: 5960: 5958: 5941: 5937: 5933: 5927: 5925: 5908: 5901: 5885: 5881: 5875: 5873: 5863: 5858: 5850: 5848: 5846: 5844: 5842: 5833: 5829: 5823: 5815: 5811: 5805: 5797: 5793: 5792:"Akasa Linea" 5787: 5779: 5775: 5774:"Weeyo Lobus" 5769: 5761: 5757: 5751: 5743: 5737: 5721: 5714: 5707: 5696: 5695: 5687: 5685: 5675: 5670: 5663: 5661: 5652: 5648: 5643: 5638: 5631: 5630: 5616: 5614: 5598: 5594: 5587: 5585: 5583: 5566: 5562: 5555: 5539: 5535: 5528: 5526: 5514: 5513: 5505: 5503: 5501: 5493: 5481: 5477: 5473: 5467: 5465: 5463: 5446: 5442: 5436: 5434: 5432: 5423: 5419: 5414: 5409: 5405: 5401: 5396: 5391: 5387: 5383: 5379: 5372: 5370: 5368: 5366: 5364: 5352: 5351: 5343: 5332: 5331: 5316: 5314: 5305: 5301: 5297: 5293: 5289: 5285: 5281: 5277: 5273: 5269: 5265: 5261: 5254: 5238: 5234: 5230: 5224: 5222: 5220: 5218: 5216: 5214: 5197: 5193: 5186: 5178: 5174: 5170: 5166: 5162: 5158: 5153: 5148: 5144: 5140: 5133: 5131: 5122: 5118: 5113: 5108: 5104: 5100: 5096: 5092: 5088: 5077: 5075: 5066: 5062: 5058: 5054: 5050: 5046: 5041: 5036: 5032: 5028: 5021: 5013: 5009: 5005: 5001: 4997: 4993: 4989: 4985: 4981: 4977: 4972: 4967: 4963: 4959: 4951: 4949: 4947: 4945: 4943: 4927: 4923: 4916: 4901: 4897: 4896: 4891: 4884: 4876: 4872: 4868: 4864: 4859: 4854: 4850: 4846: 4839: 4837: 4835: 4818: 4814: 4807: 4792: 4791: 4786: 4779: 4763: 4759: 4752: 4750: 4741: 4737: 4733: 4729: 4725: 4721: 4717: 4713: 4709: 4705: 4701: 4696: 4691: 4687: 4683: 4679: 4672: 4670: 4658: 4657: 4649: 4647: 4638: 4634: 4630: 4626: 4622: 4618: 4614: 4610: 4605: 4600: 4596: 4592: 4591: 4575: 4573: 4571: 4569: 4567: 4565: 4563: 4561: 4559: 4557: 4555: 4553: 4551: 4549: 4547: 4545: 4543: 4541: 4539: 4537: 4535: 4533: 4531: 4529: 4527: 4525: 4523: 4521: 4519: 4517: 4501: 4497: 4490: 4488: 4486: 4484: 4475: 4468: 4462: 4460: 4451: 4447: 4440: 4432: 4428: 4421: 4405: 4401: 4395: 4393: 4391: 4389: 4373: 4372: 4367: 4360: 4352: 4348: 4343: 4338: 4334: 4330: 4326: 4322: 4318: 4311: 4309: 4307: 4291: 4287: 4280: 4278: 4276: 4274: 4265: 4263:9781845415235 4259: 4255: 4254: 4246: 4238: 4234: 4227: 4220: 4216: 4209: 4201: 4194: 4188: 4186: 4169: 4168: 4163: 4157: 4149: 4145: 4144: 4139: 4132: 4124: 4120: 4116: 4110: 4094: 4090: 4083: 4081: 4079: 4077: 4075: 4073: 4061: 4057: 4050: 4046: 4045:Buie, Marc W. 4040: 4032: 4028: 4024: 4018: 4003: 3999: 3998: 3993: 3989: 3988:Throop, Henry 3985: 3984:Lauer, Tod R. 3979: 3977: 3968: 3964: 3957: 3956: 3948: 3946: 3937: 3933: 3929: 3923: 3921: 3904: 3900: 3896: 3890: 3888: 3879: 3875: 3874: 3869: 3863: 3844: 3838: 3830: 3814: 3810: 3809: 3803: 3796: 3788: 3784: 3779: 3774: 3770: 3766: 3761: 3756: 3752: 3748: 3744: 3737: 3735: 3726: 3722: 3718: 3714: 3709: 3704: 3700: 3696: 3682: 3680: 3671: 3667: 3663: 3659: 3654: 3649: 3645: 3641: 3633: 3631: 3629: 3627: 3625: 3616: 3612: 3608: 3604: 3600: 3596: 3592: 3588: 3584: 3580: 3575: 3570: 3566: 3562: 3555: 3553: 3551: 3549: 3547: 3545: 3543: 3531: 3530: 3516: 3514: 3512: 3503: 3499: 3494: 3489: 3485: 3481: 3476: 3471: 3467: 3463: 3459: 3452: 3450: 3440: 3436: 3435: 3430: 3424: 3422: 3420: 3418: 3409: 3405: 3401: 3397: 3393: 3389: 3385: 3381: 3377: 3370: 3368: 3366: 3364: 3362: 3360: 3358: 3356: 3354: 3352: 3350: 3348: 3331: 3327: 3321: 3319: 3302: 3299: 3298:Buie, Marc W. 3293: 3291: 3274: 3267: 3265: 3263: 3246: 3242: 3236: 3234: 3232: 3230: 3228: 3226: 3224: 3222: 3206: 3202: 3196: 3194: 3192: 3190: 3185: 3171: 3163: 3158: 3152: 3145: 3144: 3137: 3130: 3129: 3121: 3110: 3101:/aːrahkwatas/ 3086: 3082: 3076: 3059: 3052: 3051: 3042: 3018: 3017: 3008: 2984: 2980: 2979: 2971: 2970: 2961: 2937: 2932: 2930: 2925: 2916: 2913: 2911: 2907: 2904: 2902: 2899: 2898: 2894: 2883: 2867: 2852: 2840: 2828: 2819: 2815: 2808: 2796: 2784: 2772: 2753: 2751: 2746: 2742: 2740: 2734: 2732: 2728: 2724: 2719: 2713: 2708: 2703: 2700: 2696: 2688: 2683: 2673: 2652: 2646: 2641: 2636: 2626: 2624: 2621: 2615: 2612: 2608: 2598: 2589: 2587: 2582: 2579: 2575: 2571: 2566: 2564: 2559: 2555: 2550: 2545: 2543: 2538: 2534: 2530: 2525: 2522: 2518: 2514: 2500: 2488: 2468: 2464: 2454: 2445: 2436: 2417: 2414: 2413: 2408: 2404: 2400: 2395: 2393: 2389: 2384: 2373: 2368: 2358: 2354: 2350: 2346: 2341: 2339: 2335: 2331: 2323: 2319: 2315: 2311: 2303: 2299: 2294: 2289: 2274: 2271: 2267: 2266:impact events 2262: 2260: 2255: 2254:walking speed 2249: 2246: 2242: 2237: 2234: 2229: 2218: 2215: 2209: 2207: 2203: 2198: 2187: 2178: 2176: 2163: 2153: 2139: 2136: 2132: 2129:of Arrokoth. 2128: 2119: 2114: 2112: 2108: 2104: 2100: 2096: 2091: 2086: 2084: 2080: 2076: 2071: 2067: 2063: 2060:Results from 2049: 2037: 2023: 2021: 2017: 2013: 2009: 2005: 2001: 1997: 1993: 1988: 1986: 1981: 1977: 1972: 1970: 1960: 1950: 1945: 1943: 1939: 1935: 1931: 1927: 1923: 1919: 1915: 1905: 1895: 1884: 1875: 1870: 1861: 1856: 1847: 1842: 1833: 1822: 1817: 1804: 1801:Animation of 1797: 1787: 1776: 1766: 1759: 1745: 1743: 1739: 1735: 1734:radionuclides 1731: 1727: 1722:0.5 g/cm 1718: 1703: 1700: 1696: 1693: 1690: 1689: 1685: 1682: 1678: 1674: 1671: 1668: 1666: 1662: 1661: 1657: 1654: 1650: 1647: 1644: 1641: 1638: 1637: 1633: 1630: 1626: 1622: 1619: 1616: 1615: 1611: 1608: 1604: 1601: 1598: 1595: 1594: 1589: 1583:Name approved 1582: 1579: 1576: 1572: 1566: 1564: 1559: 1556: 1551: 1547: 1541: 1539: 1535: 1529: 1527: 1526: 1521: 1517: 1516:scarp retreat 1513: 1512: 1507: 1503: 1499: 1494: 1490: 1485: 1483: 1479: 1475: 1471: 1461: 1456: 1446: 1444: 1439: 1434: 1432: 1427: 1423: 1422:impact events 1412: 1410: 1406: 1402: 1398: 1394: 1390: 1385: 1383: 1379: 1373: 1369: 1365: 1361: 1357: 1353: 1349: 1345: 1341: 1337: 1333: 1330:compounds by 1329: 1325: 1321: 1317: 1313: 1309: 1305: 1300: 1298: 1295: 1290: 1282: 1278: 1274: 1270: 1266: 1262: 1258: 1254: 1251: 1247: 1243: 1240: 1234: 1230: 1220: 1216: 1207: 1198: 1189: 1170: 1168: 1164: 1160: 1155: 1153: 1149: 1144: 1140: 1135: 1131: 1128:Prior to the 1126: 1122: 1119: 1115: 1108: 1102: 1098: 1094: 1087: 1082: 1073: 1071: 1067: 1063: 1059: 1055: 1051: 1047: 1043: 1039: 1035: 1031: 1027: 1022: 1019: 1014: 1010: 1001: 992: 990: 986: 981: 979: 975: 970: 965: 961: 957: 956:ancient Greek 952: 943: 942:Ancient Greek 938: 937: 931: 921: 919: 915: 911: 900: 892: 888: 880: 870: 867: 856: 846: 842: 838: 836: 831: 826: 824: 820: 816: 812: 808: 807:planetesimals 804: 800: 799: 794: 790: 786: 782: 778: 774: 766: 762: 753: 748: 743: 740: 739: 732: 728: 725: 720: 695: 692: 689: 688:Spectral type 684: 676: 673: 671: 667: 664: 663: 659: 656: 653: 651: 647: 646: 642: 638: 625: 611: 608: 603: 593: 590: 584: 574: 570: 563: 557: 554: 549: 545: 536: 533: 528: 519:0.0001 g 516: 513: 507: 500: 491: 488: 482: 470: 468: 464: 458: 456: 452: 448:12.79 km 443:15.86 km 438:18.26 km 435: 432: 431:Mean diameter 427: 402: 400: 396: 393: 389: 385: 382: 377: 373: 370: 365: 361: 359: 355: 351: 348: 343: 340: 336: 333: 328: 325: 321: 318: 313: 309: 307: 303: 299: 296: 291: 287: 285: 281: 278: 274: 272: 268: 264: 262: 258: 254: 250: 246: 242: 238: 235: 231: 225: 222: 220: 217: 215: 212: 211: 209: 206: 201: 194: 191: 188: 180: 179: 177: 174: 169: 164: 159: 156: 150: 145: 119: 117:Pronunciation 115: 111: 108: 103: 98: 94: 90: 86: 82: 80: 76: 70: 67: 65: 62: 61: 59: 57: 53: 48: 41: 36: 30: 19: 10496:New Horizons 10408: 10401: 10276:Alice Bowman 10208:Institutions 9932:Observations 9922: 9877:New Horizons 9876: 9852:New Horizons 9850: 9809:Space debris 9529: 9470: 9436:162173 Ryugu 9429: 9421: 9409: 9403: 9397: 9393:New Horizons 9391: 9034:Gliese 357 d 8925:66391 Moshup 8707: 8672: 8668:New Horizons 8666: 8658: 8640: 8631: 8623: 8610: 8595:46P/Wirtanen 8522:V906 Carinae 8487:first imaged 8005:(mission to 8000: 7992: 7985:(mission to 7976: 7964: 7873: 7865: 7857: 7849: 7841: 7825: 7810: 7802: 7799:Orbital info 7794: 7786: 7777: 7724:. Retrieved 7719: 7710: 7698:. Retrieved 7692: 7682: 7669: 7645:. Retrieved 7636: 7627: 7615:. Retrieved 7611:Sci-News.com 7610: 7601: 7588: 7579: 7567:. Retrieved 7558: 7549: 7537:. Retrieved 7528: 7519: 7507:. Retrieved 7498: 7489: 7477:. Retrieved 7454: 7444: 7432:. Retrieved 7428: 7418: 7406:. Retrieved 7402: 7392: 7383: 7374: 7362:. Retrieved 7353: 7344: 7332:. Retrieved 7302: 7296: 7284:. Retrieved 7276: 7266: 7256:21 September 7254:. Retrieved 7250:the original 7224:. Retrieved 7215: 7206: 7194:. Retrieved 7190:the original 7180: 7168:. Retrieved 7163: 7139:. Retrieved 7132:the original 7123: 7093:. Retrieved 7084: 7027: 7023: 7006: 6994:. Retrieved 6990:the original 6972: 6965: 6953:. Retrieved 6944: 6919: 6910: 6898:. Retrieved 6869:. Retrieved 6863: 6853: 6840: 6816:. Retrieved 6812:the original 6785: 6763:the original 6758: 6734:. Retrieved 6724: 6712:. Retrieved 6708: 6698: 6686:. Retrieved 6674: 6670: 6601: 6597: 6591: 6570: 6551: 6541: 6498: 6494: 6411: 6407: 6400: 6388:. Retrieved 6382: 6358:. Retrieved 6354: 6319: 6312: 6300:. Retrieved 6296: 6269:. Retrieved 6264: 6255: 6243:. Retrieved 6234: 6210:. Retrieved 6148: 6144: 6082:. Retrieved 6077: 6068: 6047: 6026:the original 5995: 5944:. Retrieved 5936:The Sky Live 5935: 5911:. Retrieved 5900: 5888:. Retrieved 5883: 5831: 5822: 5813: 5804: 5795: 5786: 5777: 5768: 5759: 5756:"Wenu Lobus" 5750: 5736: 5724:. Retrieved 5719: 5706: 5693: 5622: 5600:. Retrieved 5596: 5569:. Retrieved 5565:Science News 5564: 5554: 5542:. Retrieved 5537: 5511: 5491: 5484:. Retrieved 5475: 5449:. Retrieved 5444: 5385: 5381: 5349: 5342: 5322: 5263: 5259: 5253: 5241:. Retrieved 5232: 5200:. Retrieved 5196:the original 5185: 5142: 5138: 5094: 5090: 5083:"Effect of H 5030: 5026: 5020: 4961: 4957: 4929:. Retrieved 4925: 4915: 4903:. Retrieved 4895:Science News 4893: 4883: 4848: 4844: 4821:. Retrieved 4817:the original 4806: 4794:. Retrieved 4788: 4778: 4766:. Retrieved 4762:the original 4685: 4681: 4655: 4594: 4588: 4503:. Retrieved 4499: 4473: 4449: 4439: 4430: 4420: 4408:. Retrieved 4403: 4375:. Retrieved 4369: 4359: 4324: 4320: 4293:. Retrieved 4289: 4252: 4245: 4236: 4226: 4218: 4208: 4199: 4172:. Retrieved 4165: 4156: 4148:the original 4141: 4131: 4118: 4109: 4097:. Retrieved 4093:the original 4060:the original 4039: 4026: 4017: 4005:. Retrieved 3995: 3954: 3931: 3907:. Retrieved 3898: 3871: 3862: 3850:. Retrieved 3837: 3817:. Retrieved 3806: 3795: 3750: 3746: 3698: 3694: 3643: 3639: 3564: 3560: 3522: 3465: 3461: 3432: 3383: 3379: 3334:. Retrieved 3329: 3305:. Retrieved 3277:. Retrieved 3249:. Retrieved 3244: 3208:. Retrieved 3170: 3162:New Horizons 3161: 3151: 3143:New Horizons 3141: 3136: 3112:*aːlaxkwatwi 3075: 3058: 2983:New Horizons 2982: 2935: 2910:New Horizons 2909: 2750:New Horizons 2749: 2745:New Horizons 2744: 2743: 2735: 2731:New Horizons 2730: 2707:New Horizons 2706: 2699:New Horizons 2698: 2692: 2687:New Horizons 2686: 2672:New Horizons 2671: 2616: 2611:New Horizons 2610: 2603: 2583: 2567: 2546: 2537:New Horizons 2536: 2533:Christchurch 2526: 2517:New Horizons 2516: 2510: 2410: 2403:New Horizons 2402: 2396: 2394:spacecraft. 2392:New Horizons 2391: 2388:New Horizons 2387: 2357:New Horizons 2356: 2345:New Horizons 2344: 2342: 2334:New Horizons 2333: 2330:New Horizons 2329: 2322:New Horizons 2321: 2318:New Horizons 2317: 2314:New Horizons 2313: 2307: 2263: 2250: 2238: 2228:New Horizons 2227: 2224: 2210: 2194: 2159: 2150:12–14 K 2135:New Horizons 2134: 2115: 2111:New Horizons 2110: 2099:New Horizons 2098: 2095:New Horizons 2094: 2090:New Horizons 2089: 2087: 2083:aspect ratio 2078: 2074: 2059: 1989: 1973: 1968: 1958: 1949:New Horizons 1948: 1946: 1913: 1903: 1891: 1873: 1859: 1845: 1831: 1820: 1816:New Horizons 1815: 1803:New Horizons 1802: 1765:New Horizons 1764: 1714: 1672: 1663:Kaʼan 1648: 1624: 1602: 1587: 1560: 1542: 1530: 1523: 1520:lag deposits 1509: 1493:New Horizons 1492: 1486: 1467: 1438:New Horizons 1437: 1435: 1418: 1397:New Horizons 1396: 1386: 1372:New Horizons 1371: 1301: 1277:formaldehyde 1263:and complex 1242:spectrometer 1233:New Horizons 1232: 1226: 1167:tidal forces 1156: 1143:New Horizons 1142: 1139:New Horizons 1138: 1134:occultations 1130:New Horizons 1129: 1127: 1123: 1118:New Horizons 1117: 1113: 1111: 1106:(3D version) 1097:Stereoscopic 1066:New Horizons 1065: 1054:New Horizons 1053: 1049: 1030:New Horizons 1029: 1025: 1023: 1006: 988: 982: 974:New Horizons 973: 969:ultima Thule 930:Ultima Thule 929: 927: 924:Ultima Thule 914:minor planet 887:New Horizons 886: 876: 845:New Horizons 844: 835:New Horizons 834: 827: 819:eccentricity 798:New Horizons 796: 795:space probe 777:Ultima Thule 776: 767: 760: 759: 737: 542:0.0005 460:3185 km 332:Mean anomaly 306:Eccentricity 100:Designations 95:26 June 2014 64:Marc W. Buie 29: 10397:Kuiper belt 10370:launch site 10350:upper stage 10296:Cathy Olkin 10134:Instruments 9977:28978 Ixion 9972:15810 Arawn 9799:Cosmic dust 9763:Long-period 9753:Halley-type 9709:Kuiper belt 9594:Designation 9438:; Dec 2019) 9423:Opportunity 9418:; Jan 2019) 9351:78P/Gehrels 9319:exoasteroid 9315:WD 0145+234 9278:water vapor 9244:GRB 190114C 9234:ASASSN-19bt 9215:Discoveries 9179:V1298 Tauri 9143:Struve 2398 8861:(announced) 8805:LightSail 2 8784:Space probe 8570:66P/du Toit 8528:V392 Persei 8516:V357 Muscae 8475:FarFarOut ( 8447:(announced) 8416:Discoveries 8023:; Dec 2018) 8009:; Oct 2018) 8002:BepiColombo 7989:; May 2018) 7973:; May 2018) 7944:Space probe 7647:3 September 7479:27 December 7434:30 December 7408:31 December 7164:Space Daily 7141:26 December 6245:27 December 6202:Stern, Alan 5602:22 February 5486:23 February 5306:. eaba6889. 5202:17 November 4738:. aay6620. 4410:12 November 4377:26 February 4099:4 September 3819:29 December 3307:18 February 3105:/aːnakkwat/ 3097:/aːrahkwat/ 2727:Sagittarius 2645:Sagittarius 2629:Exploration 2586:light curve 2549:Hill sphere 2467:occultation 2463:Sagittarius 2372:astrometric 2277:Observation 2171:1 g/cm 2131:Radiometric 2062:photometric 2000:Kuiper belt 1673:kaʼan 1639:Akasa Linea 1623:𞤱𞤫𞥅𞤴𞤮 1617:Weeyo Lobus 1586:(Date 1580:Named after 1443:sublimation 1409:Bond albedo 1336:ultraviolet 1332:cosmic rays 1297:5145 Pholus 1253:wavelengths 1114:Akasa Linea 1048:, the name 964:cartography 837:Search Team 785:Kuiper belt 589:declination 510:Equatorial 358:Inclination 347:Mean motion 153:Named after 10440:Categories 10316:Hal Weaver 10311:Alan Stern 10181:Subsystems 10126:Spacecraft 9908:132524 APL 9804:Meteoroids 9783:Sungrazing 9758:Hyperbolic 9714:Oort cloud 9657:Near-Earth 9371:171P/Spahr 9321:disruption 9304:2I/Borisov 9081:Kepler-47d 9070:Gliese 784 9064:Gliese 754 9058:Gliese 555 9052:Gliese 687 9039:Gliese 588 9028:Gliese 251 9022:DS Tucanae 8998:Exoplanets 8651:(asteroid 8649:OSIRIS-REx 8645:(Nov 2018) 8643:retirement 8628:(Oct 2018) 8626:retirement 8615:(asteroid 8565:37P/Forbes 8498:SN 2018cow 8428:VVV-WIT-07 8397:HD 89345 b 8312:Exoplanets 7744:Arrokoth ( 7726:2 February 7569:5 November 7539:5 November 7509:5 November 7364:6 November 7037:1806.09684 6900:25 January 6714:15 January 6709:Planetaria 6611:1806.08393 6421:2005.06525 6414:: 113824. 6390:1 December 6271:2 February 6158:1812.04758 6084:4 February 5946:5 February 5913:4 February 5890:4 February 5862:1901.02850 5726:14 October 5674:1902.00997 5642:1901.02578 5395:1812.09785 5152:2009.02277 5145:: 114072. 5097:(2): L31. 5040:2003.00670 5033:: 113831. 5014:. aay3705. 4971:2002.06720 4858:2010.06434 4823:9 February 4695:2003.05576 4639:. aaw9771. 4604:2004.01017 4119:HubbleSite 4027:HubbleSite 4007:26 January 3831:required.) 3760:1906.02071 3708:1812.04752 3653:2003.01224 3646:: 113723. 3617:. aay3999. 3574:2004.00727 3475:2001.00125 3468:(4): 130. 3443:64 minutes 3336:2 February 3181:References 3157:astrometry 3091:'sky' and 2906:132524 APL 2812:4:08 2716:43.4 2702:spacecraft 2633:See also: 2558:Santa Cruz 2465:during an 2286:See also: 2270:sputtering 2066:magnitudes 1974:Having an 1922:perihelion 1855:132524 APL 1738:outgassing 1607:Mapudungun 1596:Wenu Lobus 1555:axial tilt 1502:terminator 1498:avalanches 1489:depression 1433:material. 1368:solar wind 1324:photolysis 839:using the 553:Axial tilt 477:10 kg 399:Dimensions 284:Perihelion 247:2458600.5) 10360:3rd stage 10329:Logistics 10291:Brian May 10281:Marc Buie 10201:Personnel 9694:Damocloid 9431:Hayabusa2 9405:Chang'e 4 9361:163P/NEAT 9259:GW190521g 9239:AT2019qiz 9108:LP 816-60 9092:L 1159-16 9083:confirmed 9076:HR 5183 b 9011:AD Leonis 8874:Selected 8799:Beresheet 8660:Voyager 2 8612:Hayabusa2 8555:C/2017 U7 8493:AT2018hyz 8329:possible 8075:Selected 8013:Chang'e 4 7854:Ephemeris 7846:Discovery 7783:Ephemeris 7700:2 January 7617:5 January 7313:. 509.06. 7226:21 August 7196:21 August 7064:118993544 6636:119506499 6446:218628659 6355:Space.com 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