1710:, which holds exactly only for two point-like masses, would no longer be valid for the Regulus system. Regulus A was long thought to be fairly young, only 50–100 million years old, calculated by comparing its temperature, luminosity, and mass. The existence of a white dwarf companion would mean that the system is at least 1 billion years old, just to account for the formation of the white dwarf. The discrepancy can be accounted for by a history of mass transfer onto a once-smaller Regulus A.
39:
5142:
5287:
46:
5311:
1538:
5299:
1675:
1558:
1725:: the photosphere at Regulus' poles is considerably hotter, and five times brighter per unit surface area, than its equatorial region. The star's surface at the equator rotates at about 320 kilometres per second (199 miles per second), or 96.5% of its critical angular velocity for break-up. It is emitting
1641:
Although best seen in the evening in the northern hemisphere's late winter and spring, Regulus appears at some time of night throughout the year except for about a month (depending on ability to compensate for the sun's glare, ideally done so in twilight) on either side of August 22–24, when the Sun
1553:
of +1.35. The light output is dominated by
Regulus A. Regulus B, if seen in isolation, would be a binocular object of magnitude +8.1, and its companion, Regulus C, the faintest of the three stars that has been directly observed, would require a substantial telescope to be seen, at magnitude +13.5.
2579:
McAlister, H. A.; ten
Brummelaar, T. A.; Gies; Huang; Bagnuolo, Jr.; Shure; Sturmann; Sturmann; Turner; Taylor; Berger; Baines; Grundstrom; Ogden; Ridgway; Van Belle; et al. (2005). "First Results from the CHARA Array. I. An Interferometric and Spectroscopic Study of the Fast Rotator Alpha
1661:
passes very near the star system around or a few days before the heliacal rising, as on 5 September 2022 (the superior conjunction of Venus happens about two days earlier with each turn of its 8-year cycle, so as this cycle continues Venus will more definitely pass
Regulus
1767:قلب الأسد, meaning 'the heart of the lion', a name already attested in the Greek Kardia Leontos whose Latin equivalent is Cor Leōnis. The Arabic phrase is sometimes approximated as Kabelaced. In Chinese it is known as 軒轅十四, the Fourteenth Star of Xuanyuan, the
1554:
Regulus A is itself a spectroscopic binary; the secondary star has not yet been directly observed as it is much fainter than the primary. The BC pair lies at an angular distance of 177 arc-seconds from
Regulus A, making them visible in amateur telescopes.
2520:
Che, X.; Monnier, J. D.; Zhao, M.; Pedretti, E.; Thureau, N.; Mérand, A.; ten
Brummelaar, T.; McAlister, H.; Ridgway, S. T.; Turner, N.; Sturmann, J.; Sturmann, L. (2011-04-18). "Colder and Hotter: Interferometric imaging of β Cassiopeiae and α Leonis".
1605:
and involves more light reaching the Earth than such other stars, the system has advanced telescopic use (to study and identify objects occulting and casting their shadow on a telescope, including known or unknown asteroids of the Solar System such as
1698:. The two stars take approximately 40 days to complete an orbit around their common centre of mass. Given the extremely distorted shape of the primary, the relative orbital motion may be notably altered with respect to the two-body purely
1686:
consisting of at least four stars. Regulus A is the dominant star, with a binary companion 177" distant that is thought to be physically related. Regulus D is a 12th magnitude companion at 212", but is an unrelated background object.
2208:
Gies, D.R.; Dieterich, S.; Richardson, N. D.; Riedel, A. R.; Team, B. L.; McAlister, H. A.; Bagnuolo, Jr., W. G.; Grundstrom, E. D.; Štefl, S.; Rivinius, Th.; Baade, D.; et al. (2008). "A Spectroscopic Orbit for
Regulus".
5176:
1613:
The last occultation of
Regulus by a planet was on July 7, 1959, by Venus. The next will occur on October 1, 2044, also by Venus. Other planets will not occult Regulus over the next few millennia because of their
5169:
2748:
Cotton, Daniel V; Bailey, Jeremy; Howarth, Ian D; Bott, Kimberly; Kedziora-Chudczer, Lucyna; Lucas, P. W; Hough, J. H (2017). "Polarization due to rotational distortion in the bright star
Regulus".
2893:
Casagrande, L.; et al. (2011). "New constraints on the chemical evolution of the solar neighbourhood and
Galactic disc(s). Improved astrophysical parameters for the Geneva-Copenhagen Survey".
5162:
2049:
Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars".
1525:(WGSN) to catalog and standardize proper names for stars. The WGSN's first bulletin of July 2016 included a table of the first two batches of names approved by the WGSN; which included
1844:
3147:
Sigismondi, C.; Flatres, T.; George, T.; Braga-Ribas, F. (2014). "Stellar limb darkening scan during 163 Erigone asteroidal occultation of
Regulus on March 20, 2014 at 6:06 UT".
1717:
mass. It is spinning extremely rapidly, with a rotation period of only 15.9 hours (for comparison, the rotation period of the Sun is 25 days), which causes it to have a highly
5154:
1744:
number HD 87884. The first is a K2V star, while the second is about M4V. The companion pair has an orbital period of about 600 years with a separation of 2.5" in 1942.
2686:
Baines, Ellyn K.; Armstrong, J. Thomas; Schmitt, Henrique R.; Zavala, R. T.; Benson, James A.; Hutter, Donald J.; Tycner, Christopher; van Belle, Gerard T. (2017).
1763:
equivalent is Basiliskos or, in Latinised form, Basiliscus. The name Regulus first appeared in the early 16th century. It is also known as Qalb al-Asad, from the
1581:. The last spate was around 2017, with occultations every month from December 2016 till July 2017, each one limited to certain areas on Earth. Occultations by
1931:
1349:
1322:
1597:
are less than 0.9° from the ecliptic (perfected, mean plane of Earth's orbit and mean apparent path of the Sun) the next brightest of which is
1166:
911:
3521:
5184:
3694:
3220:
1638:, but no one is known to have seen it, due to cloud cover. The International Occultation Timing Association recorded no observations at all.
2633:
Fitzpatrick, E. L.; Massa, D. (March 2005). "Determining the Physical Properties of the B Stars. II. Calibration of Synthetic Photometry".
2178:
Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007–2013)".
1993:
van Belle, Gerard T.; von Braun, Kaspar (2009). "Directly Determined Linear Radii and Effective Temperatures of Exoplanet Host Stars".
1647:
3073:
3069:
5381:
1978:
5361:
1867:
3563:
3448:
3029:
1740:
and are thought to orbit each other taking several million years. Designated Regulus B and Regulus C, the pair has
3463:
2866:
Martin, E. L.; Magazzu, A.; Rebolo, R. (1992). "On the post-T-Tauri nature of late-type visual companions to B-type stars".
3106:
Sigismondi, Costantino; Troise, Davide (2008). "Asteroidal Occultation of Regulus:. Differential Effect of Light Bending".
5341:
5336:
5185:
Notable stars and star systems coplanar with the ecliptic (and sun and approximately its planets, but specifically earth)
3411:
2078:
1643:
1657:(pre-sunrise appearance) of Regulus occurs late in the first week of September, or in the second week. Every 8 years,
3687:
3131:
5391:
1518:
1276:
3609:
3174:
2151:
Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system".
5366:
1642:
is too close. The star can be viewed the whole night, crossing the sky, in late February. Regulus passes through
1522:
67:
2455:
5376:
5346:
3344:
3108:
THE ELEVENTH MARCEL GROSSMANN MEETING on Recent Developments in Theoretical and Experimental General Relativity
1289:
961:
3614:
1694:
star of spectral type B8, which is orbited by a star of at least 0.3 solar masses, which is probably a
5351:
5145:
3680:
3619:
3385:
Lindroos, K. P. (1985). "A study of visual double stars with early type primaries. IV Astrophysical data".
1284:
3249:
Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (2001).
1622:
was filmed in Italy on October 19, 2005. Differential bending of light was measured to be consistent with
3480:
3303:
2397:
1353:
1326:
1310:
3579:
Rogers, J. H. (February 1998). "Origins of the ancient constellations: I. The Mesopotamian traditions".
1541:
Regulus through Celestron CGEM DX 1100 @ F6.3, Canon T3i, Televue 4X Powermate, ISO 800, 30 sec exposure
5386:
5371:
5277:
3533:
3475:
1678:
Regulus is the brightest star in the constellation of Leo (right tip, below is bright Jupiter in 2004).
5331:
4258:
3440:
Geminos's Introduction to the Phenomena: A Translation and Study of a Hellenistic Survey of Astronomy
3290:
2384:
2211:
1894:
1280:
89:
3045:
2946:
4428:
4423:
3719:
3199:
20:
4418:
2967:
1899:
1401:
1437:
5356:
5115:
4324:
3361:
3228:
2806:
Rappaport, S.; Podsiadlowski, Ph.; Horev, I. (2009). "The Past and Future History of Regulus".
1741:
1702:
scenario because of non-negligible long-term orbital perturbations affecting, for example, its
1345:
1314:
374:
315:
3555:
3548:
5064:
5054:
4605:
4301:
3877:
1907:
1707:
1417:
1382:
1373:
1339:
1304:
1272:
1249:
1174:
1063:
919:
3398:
3327:
2916:
2879:
2420:
2120:
2062:
1957:
5069:
5049:
4443:
3714:
3588:
3394:
3322:
3262:
3156:
3111:
2912:
2875:
2825:
2767:
2709:
2652:
2599:
2492:
2416:
2343:
2296:
2230:
2187:
2160:
2116:
2058:
2012:
1953:
1737:
1726:
1601:, of magnitude +3.53. As Regulus closely aligns to the mean orbits of large bodies of the
1487:
751:
637:
510:
2991:
8:
3703:
3251:"The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog"
3086:
1819:
1397:
1318:
82:
3592:
3266:
3160:
3115:
2829:
2771:
2713:
2656:
2603:
2496:
2347:
2300:
2234:
2191:
2164:
2016:
5315:
5241:
3501:
3416:
3312:
2928:
2902:
2841:
2815:
2783:
2757:
2727:
2699:
2668:
2642:
2615:
2589:
2530:
2434:
2406:
2359:
2333:
2286:
2246:
2220:
2028:
2024:
2002:
1969:
1943:
1623:
1607:
1550:
658:
531:
281:
231:
2837:
5207:
4247:
4240:
4233:
3738:
3559:
3444:
3127:
3025:
2731:
2672:
2548:
2544:
2438:
2363:
2250:
2074:
1779:
1733:
1722:
1630:
in the early morning of March 20, 2014. The center of the shadow path passed through
1594:
1506:
1409:
989:
362:
303:
63:
2932:
2845:
2787:
2032:
1973:
1444:
star and its companion, which has not yet been directly observed, but is probably a
5291:
5247:
5100:
5085:
4479:
4226:
3332:
3270:
3119:
3017:
2920:
2833:
2775:
2717:
2688:"Fundamental parameters of 87 stars from the Navy Precision Optical Interferometer"
2660:
2619:
2607:
2540:
2500:
2449:
2445:
2424:
2351:
2304:
2238:
2124:
2066:
2020:
1961:
1888:
1772:
1631:
1582:
1578:
1196:
1141:
949:
941:
879:
621:
494:
148:
142:
102:
3337:
3294:
2924:
2429:
2388:
5217:
4469:
3644:
3634:
3629:
3485:
3438:
3421:
2180:
VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S
1965:
1764:
1718:
1654:
1635:
1598:
1546:
1154:
892:
722:
553:
419:
252:
202:
96:
3654:
3021:
5253:
4567:
3847:
3822:
3766:
3123:
2722:
2687:
2309:
2274:
1768:
1760:
1703:
1479:
1263:
764:
702:
629:
609:
589:
502:
482:
462:
2779:
2578:
2355:
2324:
Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation".
2070:
5325:
4438:
4433:
3802:
3529:
3471:
2552:
1462:
1441:
1394:
570:
443:
367:
347:
76:
1466:
and is itself a close pair. Regulus, along with five slightly dimmer stars (
5303:
5259:
5235:
5223:
4489:
3867:
3837:
3794:
3784:
3761:
3756:
1615:
1602:
1475:
1236:
1209:
1121:
1094:
1050:
1009:
852:
800:
736:
3639:
3178:
2129:
2104:
4595:
4534:
4529:
4524:
4484:
4474:
4383:
3789:
3774:
2647:
2594:
1815:
1695:
1683:
1627:
1619:
1570:
1467:
1445:
1433:
1189:
934:
396:
385:
337:
326:
268:
218:
1843:
38:
4590:
4585:
4580:
4575:
4519:
4514:
4509:
4504:
4499:
4494:
4393:
4388:
4291:
3862:
3857:
3852:
3842:
3832:
3779:
3672:
1826:
1483:
1449:
1216:
1134:
1101:
1023:
865:
817:
644:
517:
406:
1610:, being in line by definition with their associated planetary plane).
1529:
for this star. It is now so entered in the IAU Catalog of Star Names.
4461:
4367:
4362:
4314:
4286:
4281:
4271:
4220:
4215:
4210:
4205:
4200:
4195:
4190:
4185:
4180:
4175:
4170:
4165:
4160:
4155:
4150:
4145:
4140:
4135:
4130:
4125:
4120:
4115:
4110:
4105:
4100:
4095:
4090:
4085:
4080:
4075:
4070:
4065:
4060:
4055:
4050:
4045:
4040:
4035:
4030:
4025:
4020:
4015:
4010:
4005:
4000:
3995:
3990:
3985:
3980:
3975:
3970:
3965:
3960:
3955:
3950:
3945:
3940:
3935:
3930:
3925:
3920:
3915:
3910:
3827:
3817:
3812:
3807:
2481:"Predicted infrared brightness of stars within 25 parsecs of the Sun"
2275:"Spectroscopic Detection of the Pre-White Dwarf Companion of Regulus"
1785:
1776:
1699:
1557:
1471:
1405:
45:
2393:
Early Data Release 3: Summary of the contents and survey properties"
5125:
5120:
5033:
5028:
5023:
5018:
5013:
5008:
5003:
4998:
4993:
4988:
4983:
4978:
4973:
4968:
4963:
4958:
4953:
4948:
4943:
4938:
4933:
4928:
4923:
4918:
4913:
4908:
4903:
4898:
4893:
4888:
4883:
4878:
4873:
4868:
4863:
4858:
4853:
4848:
4843:
4838:
4833:
4828:
4823:
4818:
4813:
4808:
4803:
4798:
4793:
4788:
4783:
4778:
4773:
4768:
4763:
4758:
4753:
4748:
4743:
4738:
4733:
4728:
4723:
4718:
4713:
4708:
4703:
4698:
4693:
4688:
4683:
4678:
4673:
4668:
4663:
4658:
4653:
4648:
4643:
4638:
4633:
4628:
4623:
4618:
4613:
4357:
4352:
4347:
4342:
4337:
4332:
4309:
4276:
4266:
3905:
3900:
3895:
3890:
3885:
3751:
3317:
3275:
3250:
2762:
2704:
2664:
2611:
2505:
2480:
2411:
2291:
2242:
2207:
1851:
1838:
1823:
1691:
1590:
1566:
996:
308:
3146:
2907:
2820:
2535:
2338:
2225:
2007:
1948:
5095:
5090:
4398:
2892:
1858:, meaning king, with co-descriptor, "star of the Lion's breast".
1834:
1830:
3436:
3016:. Patrick Moore's Practical Astronomy Series. pp. 157–185.
1792:("the King"), and it marked the 15th ecliptic constellation. In
4558:
4544:
4539:
3348:
2459:
1808:
1801:
1367:
1256:
1229:
1181:
1114:
1077:
1036:
926:
830:
649:
522:
123:
3299:
Data Release 2: Summary of the contents and survey properties"
3177:. International Occultation Timing Association. Archived from
1436:
composed of four stars that are organized into two pairs. The
5110:
5105:
5059:
4413:
4403:
3522:
3464:
1855:
1793:
1756:
1658:
1586:
1561:
Regulus as viewed through a 110mm refractor in full daylight.
1514:
674:
3087:"Occultations of bright stars by planets between 0 and 4000"
2685:
1537:
5191:
4408:
3729:
3248:
2805:
1690:
Regulus A is a binary star consisting of a blue-white
1574:
613:
593:
486:
466:
157:
111:
5298:
1486:) have collectively been called 'the Sickle', which is an
175:
169:
129:
1714:
1453:
166:
160:
120:
114:
3437:
Geminus; James Evans; J. L. Berggren (29 October 2006).
2968:"Bulletin of the IAU Working Group on Star Names, No. 1"
2048:
1674:
1432:. Regulus appears singular, but is actually a quadruple
2747:
2519:
2272:
1747:
5275:
3502:"Ian Ridpath's Star Tales – Regulus, the little king"
1818:' of the Persian monarchy. It was one of the fifteen
181:
178:
163:
132:
117:
172:
154:
126:
108:
19:
This article is about the star. For other uses, see
2865:
151:
105:
3547:
3293:; et al. (Gaia collaboration) (August 2018).
1992:
1887:
1545:The Regulus system as a whole is the twenty-first
1925:
1923:
1921:
1919:
1917:
1886:
1713:The primary of Regulus A has about 3.8 times the
5323:
3105:
3012:Pugh, Philip (2009). "Simple Deep Sky Viewing".
2801:
2799:
2797:
2632:
1577:. This occurs in spates every 9.3 years, due to
1569:, the closest of the bright stars, and is often
5206:
3640:Bright Star Regulus near the Leo I Dwarf Galaxy
3581:Journal of the British Astronomical Association
2323:
1988:
1986:
2886:
2474:
2472:
2470:
2468:
2177:
2105:"MSC – a catalogue of physical multiple stars"
1914:
1589:are possible but rare, as are occultations by
5170:
3688:
2794:
2743:
2741:
2478:
3387:Astronomy and Astrophysics Supplement Series
2626:
2317:
2109:Astronomy and Astrophysics Supplement Series
1983:
1814:("the Centre") and also as one of the four '
1618:. An occultation of Regulus by the asteroid
1517:for 'prince' or 'little king'. In 2016, the
2465:
2387:; et al. (Gaia collaboration) (2021).
2153:CDS/ADC Collection of Electronic Catalogues
2098:
2096:
2094:
2092:
2090:
1932:"Validation of the new Hipparcos reduction"
1929:
225:+11° 58′ 01.95″
5177:
5163:
3695:
3681:
3496:
3494:
3432:
3430:
3140:
2738:
2268:
2266:
2264:
2262:
2260:
4460:
3336:
3326:
3316:
3274:
2906:
2861:
2859:
2857:
2855:
2819:
2761:
2721:
2703:
2646:
2593:
2574:
2572:
2570:
2568:
2566:
2564:
2562:
2534:
2504:
2428:
2410:
2337:
2308:
2290:
2224:
2128:
2102:
2006:
1947:
925:10,314 (equatorial), 15,400 (polar)
66:J2000
3702:
3384:
3378:
2947:"IAU Working Group on Star Names (WGSN)"
2146:
2144:
2142:
2140:
2087:
2044:
2042:
1673:
1556:
1536:
275:+11° 59′ 48″
3491:
3427:
3414:. Charlton T. Lewis and Charles Short.
3099:
3079:
3014:The Science and Art of Using Telescopes
2984:
2485:Astrophysical Journal Supplement Series
2379:
2377:
2375:
2373:
2257:
1626:. Regulus was occulted by the asteroid
577:
450:
16:Brightest star in the constellation Leo
5324:
3578:
3572:
3192:
2852:
2679:
2559:
2479:Johnson, H. M.; Wright, C. D. (1983).
2273:Gies, Douglas R.; et al. (2020).
2203:
2201:
2150:
1868:Table of stars with Bayer designations
1736:from Regulus A. A and BC share a
1459:HD 87884 is separated from Regulus by
5158:
3676:
3645:Regulus, Mars & Coma Star Cluster
3545:
3539:
3405:
3289:
3038:
2960:
2383:
2137:
2039:
3515:
3212:
3167:
3011:
3005:
2939:
2370:
1908:participating institution membership
3615:Egg-Shaped Regulus is Spinning Fast
3457:
3283:
3242:
3218:
2513:
2198:
2171:
1759:for 'prince' or 'little king'; its
1748:Etymology and cultural associations
1448:. The system lies approximately 79
1440:Regulus A consists of a blue-white
597:
470:
13:
3550:Star Names: Their Lore and Meaning
1593:. Seven other stars which have a
1565:Regulus is 0.465 degrees from the
14:
5403:
3603:
1721:shape. This results in so-called
1669:
5309:
5297:
5285:
5141:
5140:
3635:Regulus & Leo 1 Dwarf Galaxy
3546:Allen, Richard Hinckley (1963).
2456:Gaia EDR3 record for this source
1842:
1519:International Astronomical Union
628:41.2745 ± 0.0270
147:
101:
44:
37:
5230:α (Alpha) Leonis (or "Regulus")
3354:
3345:Gaia DR2 record for this source
3062:
1493:
1393:is the brightest object in the
5382:Henry Draper Catalogue objects
3610:Portrait of a Star on the Edge
3443:. Princeton University Press.
1880:
1532:
1:
5362:Bright Star Catalogue objects
3221:"Notable objects in LASCO C3"
3074:2017 Bright Star Occultations
3070:2016 Bright Star Occultations
1873:
1775:, Regulus corresponds to the
1666:the star's heliacal rising).
55:Location of Regulus (circled)
3304:Astronomy & Astrophysics
2895:Astronomy & Astrophysics
2450:10.1051/0004-6361/202039657e
2398:Astronomy & Astrophysics
2025:10.1088/0004-637X/694/2/1085
1490:that marks the head of Leo.
501:41.13 ± 0.35
7:
3338:10.1051/0004-6361/201833051
3022:10.1007/978-0-387-76470-2_6
2992:"IAU Catalog of Star Names"
2925:10.1051/0004-6361/201016276
2838:10.1088/0004-637X/698/1/666
2430:10.1051/0004-6361/202039657
1861:
1523:Working Group on Star Names
10:
5408:
5342:M-type main-sequence stars
5337:K-type main-sequence stars
3523:
3465:
3227:. Navy.mil. Archived from
3124:10.1142/9789812834300_0469
2868:Astronomy and Astrophysics
2545:10.1088/0004-637x/732/2/68
2051:Astronomy and Astrophysics
1966:10.1051/0004-6361:20078357
1936:Astronomy and Astrophysics
18:
5200:(culmination at midnight)
5190:
5138:
5078:
5042:
4604:
4566:
4557:
4456:
4376:
4323:
4300:
4257:
3876:
3737:
3728:
3710:
3149:The Astronomer's Telegram
2808:The Astrophysical Journal
2780:10.1038/s41550-017-0238-6
2582:The Astrophysical Journal
2523:The Astrophysical Journal
2356:10.1134/S1063773712050015
2279:The Astrophysical Journal
2212:The Astrophysical Journal
2103:Tokovinin, A. A. (1997).
1995:The Astrophysical Journal
1895:Oxford English Dictionary
1732:Regulus BC is 5,000
1653:For Earth observers, the
1549:in the night sky with an
1360:
1333:
1298:
1269:
1262:
1202:
1087:
1083:
1002:
793:
788:
673:
546:
412:
405:
356:
297:
292:
242:
192:
60:
31:
4525:HD 100777 b (Laligurans)
4429:MACS J1149 Lensed Star 1
3720:Leo in Chinese astronomy
3255:The Astronomical Journal
2723:10.3847/1538-3881/aa9d8b
2692:The Astronomical Journal
2635:The Astronomical Journal
2310:10.3847/1538-4357/abb372
1930:van Leeuwen, F. (2007).
21:Regulus (disambiguation)
5392:Stars with proper names
4424:2MASS J10475385+2124234
3481:A Greek–English Lexicon
3399:1985A&AS...60..183L
3328:2018A&A...616A...1G
2917:2011A&A...530A.138C
2880:1992A&A...257..186M
2421:2021A&A...649A...1G
2121:1997A&AS..124...75T
2071:10.1888/0333750888/2862
2063:2000A&A...355L..27H
1958:2007A&A...474..653V
1900:Oxford University Press
1854:, Regulus is listed as
1509:. The traditional name
1505:) is the star system's
659:Absolute magnitude
532:Absolute magnitude
363:Evolutionary stage
304:Evolutionary stage
282:Apparent magnitude
232:Apparent magnitude
5367:Durchmusterung objects
5242:ο (Omicron) Sagittarii
4490:Gliese 436 b (Awohali)
4419:2MASSI J0937347+293142
1742:Henry Draper Catalogue
1682:Regulus is a multiple
1679:
1562:
1542:
379:K2 V + M4 V
5377:Gliese and GJ objects
5347:Multiple star systems
5116:PSO J172.3556+18.7734
3472:Liddell, Henry George
1979:Vizier catalog entry
1677:
1560:
1540:
696:α Leo Ab (HD 87901 B)
686:α Leo Aa (HD 87901 A)
5248:θ (Theta) Capricorni
5198:in opposition to sun
4520:HD 99109 b (Perwana)
4515:HD 96063 b (Ramajay)
4394:Gliese 436 (Noquisi)
3797:(Al Minliar al Asad)
3715:List of stars in Leo
3704:Constellation of Leo
1738:common proper motion
1438:spectroscopic binary
5352:Leo (constellation)
5226:(start of February)
5218:δ (Delta) Geminorum
4444:SDSS J102915+172927
4363:100777 (Sagarmatha)
3593:1998JBAA..108....9R
3366:nssdc.gsfc.nasa.gov
3267:2001AJ....122.3466M
3161:2014ATel.5987....1S
3116:2008mgm..conf.2594S
2830:2009ApJ...698..666R
2772:2017NatAs...1..690C
2714:2018AJ....155...30B
2657:2005AJ....129.1642F
2604:2005ApJ...628..439M
2580:Leonis (Regulus)".
2497:1983ApJS...53..643J
2348:2012AstL...38..331A
2301:2020ApJ...902...25G
2235:2008ApJ...682L.117G
2192:2009yCat....102025S
2165:2002yCat.2237....0D
2130:10.1051/aas:1997181
2017:2009ApJ...694.1085V
1898:(Online ed.).
1800:("the Mighty"), in
1782:("the bountiful").
1599:δ (Delta) Geminorum
1361:Database references
962:Rotational velocity
648:(24.23 ± 0.02
28:
5254:λ (Lambda) Aquarii
3554:. Dover. pp.
3417:A Latin Dictionary
3050:John Pratt's stars
1850:In the Babylonian
1829:, associated with
1807:("the Great"), in
1708:Kepler's third law
1706:. In other words,
1680:
1650:C3 every August.
1624:general relativity
1563:
1551:apparent magnitude
1543:
1424:, and abbreviated
1264:Other designations
643:79.02 ± 0.05
375:Spectral type
348:Variable type
316:Spectral type
26:
5387:Hipparcos objects
5372:Flamsteed objects
5273:
5272:
5269:
5268:
5256:(early September)
5152:
5151:
5134:
5133:
4553:
4552:
4452:
4451:
3565:978-0-486-21079-7
3450:978-0-691-12339-4
3225:Sungrazing Comets
3031:978-0-387-76469-6
2326:Astronomy Letters
1906:(Subscription or
1729:because of this.
1723:gravity darkening
1595:Bayer designation
1507:Bayer designation
1410:Bayer designation
1388:
1387:
521:(24.3 ± 0.2
5399:
5332:B-type subgiants
5314:
5313:
5312:
5302:
5301:
5290:
5289:
5288:
5281:
5260:ζ (Zeta) Piscium
5236:α (Alpha) Librae
5224:δ (Delta) Cancri
5204:
5203:
5179:
5172:
5165:
5156:
5155:
5144:
5143:
5086:Cosmic Horseshoe
4564:
4563:
4458:
4457:
4348:96063 (Dingolay)
3735:
3734:
3697:
3690:
3683:
3674:
3673:
3669:
3667:
3665:
3630:Regulus Occulted
3597:
3596:
3576:
3570:
3569:
3553:
3543:
3537:
3526:
3525:
3519:
3513:
3512:
3510:
3508:
3498:
3489:
3468:
3467:
3461:
3455:
3454:
3434:
3425:
3409:
3403:
3402:
3382:
3376:
3375:
3373:
3372:
3362:"Sun Fact Sheet"
3358:
3352:
3342:
3340:
3330:
3320:
3287:
3281:
3280:
3278:
3261:(6): 3466–3471.
3246:
3240:
3239:
3237:
3236:
3216:
3210:
3209:
3207:
3206:
3196:
3190:
3189:
3187:
3186:
3171:
3165:
3164:
3144:
3138:
3137:
3103:
3097:
3096:
3094:
3093:
3083:
3077:
3066:
3060:
3059:
3057:
3056:
3042:
3036:
3035:
3009:
3003:
3002:
3000:
2998:
2988:
2982:
2981:
2979:
2977:
2972:
2964:
2958:
2957:
2955:
2953:
2943:
2937:
2936:
2910:
2890:
2884:
2883:
2863:
2850:
2849:
2823:
2803:
2792:
2791:
2765:
2750:Nature Astronomy
2745:
2736:
2735:
2725:
2707:
2683:
2677:
2676:
2650:
2648:astro-ph/0412542
2641:(3): 1642–1662.
2630:
2624:
2623:
2597:
2595:astro-ph/0501261
2576:
2557:
2556:
2538:
2517:
2511:
2510:
2508:
2476:
2463:
2453:
2442:
2432:
2414:
2381:
2368:
2367:
2341:
2321:
2315:
2314:
2312:
2294:
2270:
2255:
2254:
2228:
2219:(2): L117–L120.
2205:
2196:
2195:
2175:
2169:
2168:
2148:
2135:
2134:
2132:
2100:
2085:
2084:
2046:
2037:
2036:
2010:
2001:(2): 1085–1098.
1990:
1981:
1977:
1951:
1927:
1912:
1911:
1903:
1891:
1884:
1846:
1796:it was known as
1773:Indian astronomy
1579:lunar precession
1465:
1343:
1308:
1293:
1075:
1073:
1048:
1046:
1021:
1019:
982:
980:
909:
907:
877:
875:
850:
848:
842:
840:
815:
814:
813:
783:
781:
745:
734:
727:
715:
713:
607:
605:
599:
587:
585:
579:
516:79.3 ± 0.7
480:
478:
472:
460:
458:
452:
436:
434:
293:Characteristics
285:
272:
261:
256:
235:
222:
211:
206:
188:
187:
184:
183:
180:
177:
174:
171:
168:
165:
162:
159:
156:
153:
146:
139:
138:
135:
134:
131:
128:
125:
122:
119:
116:
113:
110:
107:
100:
61:Observation data
48:
41:
29:
25:
5407:
5406:
5402:
5401:
5400:
5398:
5397:
5396:
5322:
5321:
5320:
5310:
5308:
5296:
5286:
5284:
5276:
5274:
5265:
5262:(early October)
5232:(late February)
5210:
5199:
5197:
5195:
5194:or star systems
5186:
5183:
5153:
5148:
5130:
5101:IRAS 10565+2448
5074:
5038:
4600:
4549:
4448:
4372:
4319:
4296:
4253:
3872:
3724:
3706:
3701:
3663:
3661:
3653:
3606:
3601:
3600:
3577:
3573:
3566:
3544:
3540:
3520:
3516:
3506:
3504:
3500:
3499:
3492:
3486:Perseus Project
3462:
3458:
3451:
3435:
3428:
3422:Perseus Project
3410:
3406:
3383:
3379:
3370:
3368:
3360:
3359:
3355:
3291:Brown, A. G. A.
3288:
3284:
3247:
3243:
3234:
3232:
3219:Battams, Karl.
3217:
3213:
3204:
3202:
3198:
3197:
3193:
3184:
3182:
3173:
3172:
3168:
3145:
3141:
3134:
3104:
3100:
3091:
3089:
3085:
3084:
3080:
3067:
3063:
3054:
3052:
3044:
3043:
3039:
3032:
3010:
3006:
2996:
2994:
2990:
2989:
2985:
2975:
2973:
2970:
2966:
2965:
2961:
2951:
2949:
2945:
2944:
2940:
2891:
2887:
2864:
2853:
2804:
2795:
2756:(10): 690–696.
2746:
2739:
2684:
2680:
2631:
2627:
2577:
2560:
2518:
2514:
2477:
2466:
2444:(Erratum:
2443:
2385:Brown, A. G. A.
2382:
2371:
2322:
2318:
2271:
2258:
2206:
2199:
2176:
2172:
2149:
2138:
2101:
2088:
2081:
2047:
2040:
1991:
1984:
1928:
1915:
1905:
1885:
1881:
1876:
1864:
1750:
1727:polarized light
1672:
1655:heliacal rising
1636:eastern Ontario
1535:
1496:
1460:
1402:brightest stars
1400:and one of the
1338:
1303:
1294:
1288:
1271:α Leonis,
1242:
1239:
1222:
1219:
1155:Surface gravity
1147:
1144:
1127:
1124:
1107:
1104:
1071:
1069:
1056:
1053:
1044:
1042:
1029:
1026:
1017:
1015:
978:
976:
968: sin
905:
903:
893:Surface gravity
885:
882:
873:
871:
858:
855:
846:
844:
838:
836:
823:
820:
811:
809:
808:
806:
779:
777:
773:
771:
744: projected
742:
732:
730:
723:Semi-major axis
720:
711:
709:
664:
647:
603:
601:
596:
583:
581:
564:+6.72 km/s
559:
554:Radial velocity
537:
520:
476:
474:
469:
456:
454:
432:
430:
425:
420:Radial velocity
280:
266:
259:
253:Right ascension
250:
230:
216:
209:
203:Right ascension
200:
150:
141:
140:
104:
95:
94:
62:
56:
54:
53:
52:
51:
50:
49:
24:
17:
12:
11:
5:
5405:
5395:
5394:
5389:
5384:
5379:
5374:
5369:
5364:
5359:
5354:
5349:
5344:
5339:
5334:
5319:
5318:
5306:
5294:
5271:
5270:
5267:
5266:
5264:
5263:
5257:
5251:
5250:(early August)
5245:
5239:
5233:
5227:
5221:
5214:
5212:
5201:
5188:
5187:
5182:
5181:
5174:
5167:
5159:
5150:
5149:
5139:
5136:
5135:
5132:
5131:
5129:
5128:
5123:
5118:
5113:
5108:
5103:
5098:
5093:
5088:
5082:
5080:
5076:
5075:
5073:
5072:
5067:
5062:
5057:
5052:
5046:
5044:
5040:
5039:
5037:
5036:
5031:
5026:
5021:
5016:
5011:
5006:
5001:
4996:
4991:
4986:
4981:
4976:
4971:
4966:
4961:
4956:
4951:
4946:
4941:
4936:
4931:
4926:
4921:
4916:
4911:
4906:
4901:
4896:
4891:
4886:
4881:
4876:
4871:
4866:
4861:
4856:
4851:
4846:
4841:
4836:
4831:
4826:
4821:
4816:
4811:
4806:
4801:
4796:
4791:
4786:
4781:
4776:
4771:
4766:
4761:
4756:
4751:
4746:
4741:
4736:
4731:
4726:
4721:
4716:
4711:
4706:
4701:
4696:
4691:
4686:
4681:
4676:
4671:
4666:
4661:
4656:
4651:
4646:
4641:
4636:
4631:
4626:
4621:
4616:
4610:
4608:
4602:
4601:
4599:
4598:
4593:
4588:
4583:
4578:
4572:
4570:
4561:
4555:
4554:
4551:
4550:
4548:
4547:
4542:
4537:
4532:
4527:
4522:
4517:
4512:
4507:
4502:
4497:
4492:
4487:
4482:
4477:
4472:
4466:
4464:
4454:
4453:
4450:
4449:
4447:
4446:
4441:
4436:
4431:
4426:
4421:
4416:
4411:
4406:
4401:
4396:
4391:
4386:
4380:
4378:
4374:
4373:
4371:
4370:
4365:
4360:
4355:
4350:
4345:
4340:
4335:
4329:
4327:
4321:
4320:
4318:
4317:
4315:4459 (Formosa)
4312:
4306:
4304:
4298:
4297:
4295:
4294:
4289:
4284:
4279:
4274:
4269:
4263:
4261:
4255:
4254:
4252:
4251:
4244:
4237:
4230:
4223:
4218:
4213:
4208:
4203:
4198:
4193:
4188:
4183:
4178:
4173:
4168:
4163:
4158:
4153:
4148:
4143:
4138:
4133:
4128:
4123:
4118:
4113:
4108:
4103:
4098:
4093:
4088:
4083:
4078:
4073:
4068:
4063:
4058:
4053:
4048:
4043:
4038:
4033:
4028:
4023:
4018:
4013:
4008:
4003:
3998:
3993:
3988:
3983:
3978:
3973:
3968:
3963:
3958:
3953:
3948:
3943:
3938:
3933:
3928:
3923:
3918:
3913:
3908:
3903:
3898:
3893:
3888:
3882:
3880:
3874:
3873:
3871:
3870:
3865:
3860:
3855:
3850:
3845:
3840:
3835:
3830:
3825:
3820:
3815:
3810:
3805:
3800:
3792:
3787:
3782:
3777:
3772:
3764:
3759:
3754:
3749:
3743:
3741:
3732:
3726:
3725:
3723:
3722:
3717:
3711:
3708:
3707:
3700:
3699:
3692:
3685:
3677:
3671:
3670:
3650:
3649:
3648:
3647:
3642:
3637:
3632:
3624:
3623:
3617:
3612:
3605:
3604:External links
3602:
3599:
3598:
3571:
3564:
3538:
3514:
3490:
3456:
3449:
3426:
3404:
3377:
3353:
3282:
3276:10.1086/323920
3241:
3211:
3191:
3175:"Regulus 2014"
3166:
3139:
3132:
3098:
3078:
3061:
3046:"Zodiac Stars"
3037:
3030:
3004:
2983:
2959:
2938:
2885:
2851:
2814:(1): 666–675.
2793:
2737:
2678:
2665:10.1086/427855
2625:
2612:10.1086/430730
2588:(1): 439–452.
2558:
2512:
2506:10.1086/190905
2464:
2369:
2316:
2285:(1). Table 3.
2256:
2243:10.1086/591148
2197:
2170:
2136:
2086:
2080:978-0333750889
2079:
2038:
1982:
1942:(2): 653–664.
1913:
1878:
1877:
1875:
1872:
1871:
1870:
1863:
1860:
1820:Behenian stars
1769:Yellow Emperor
1749:
1746:
1704:orbital period
1671:
1670:Stellar system
1668:
1616:node positions
1547:brightest star
1534:
1531:
1501:(Latinized to
1495:
1492:
1480:Epsilon Leonis
1386:
1385:
1380:
1377:
1376:
1371:
1363:
1362:
1358:
1357:
1331:
1330:
1296:
1295:
1273:32 Leonis
1270:
1267:
1266:
1260:
1259:
1253:
1245:
1244:
1240:
1237:
1233:
1225:
1224:
1220:
1217:
1213:
1205:
1204:
1200:
1199:
1193:
1185:
1184:
1178:
1170:
1169:
1163:
1150:
1149:
1145:
1142:
1138:
1130:
1129:
1125:
1122:
1118:
1110:
1109:
1105:
1102:
1098:
1090:
1089:
1085:
1084:
1081:
1080:
1067:
1059:
1058:
1054:
1051:
1040:
1032:
1031:
1027:
1024:
1013:
1005:
1004:
1000:
999:
993:
985:
984:
974:
957:
956:
953:
945:
944:
938:
930:
929:
923:
915:
914:
901:
888:
887:
883:
880:
869:
861:
860:
856:
853:
843:(equatorial),
834:
826:
825:
821:
818:
804:
796:
795:
791:
790:
786:
785:
775:
769:
765:Semi-amplitude
760:
759:
756:
747:
746:
740:
728:
717:
716:
707:
698:
697:
694:
688:
687:
684:
678:
677:
671:
670:
667:
662:
654:
653:
641:
633:
632:
626:
617:
616:
575:
566:
565:
562:
557:
549:
548:
544:
543:
540:
535:
527:
526:
514:
506:
505:
499:
490:
489:
448:
439:
438:
428:
423:
415:
414:
410:
409:
403:
402:
399:
392:
391:
388:
381:
380:
377:
371:
370:
365:
359:
358:
354:
353:
350:
344:
343:
340:
333:
332:
329:
322:
321:
318:
312:
311:
306:
300:
299:
295:
294:
290:
289:
286:
277:
276:
273:
263:
262:
257:
247:
246:
240:
239:
236:
227:
226:
223:
213:
212:
207:
197:
196:
190:
189:
92:
86:
85:
80:
72:
71:
58:
57:
43:
42:
36:
35:
34:
33:
32:
15:
9:
6:
4:
3:
2:
5404:
5393:
5390:
5388:
5385:
5383:
5380:
5378:
5375:
5373:
5370:
5368:
5365:
5363:
5360:
5358:
5357:Bayer objects
5355:
5353:
5350:
5348:
5345:
5343:
5340:
5338:
5335:
5333:
5330:
5329:
5327:
5317:
5307:
5305:
5300:
5295:
5293:
5283:
5282:
5279:
5261:
5258:
5255:
5252:
5249:
5246:
5243:
5240:
5237:
5234:
5231:
5228:
5225:
5222:
5220:(mid January)
5219:
5216:
5215:
5213:
5209:
5205:
5202:
5196:and time when
5193:
5189:
5180:
5175:
5173:
5168:
5166:
5161:
5160:
5157:
5147:
5137:
5127:
5124:
5122:
5119:
5117:
5114:
5112:
5109:
5107:
5104:
5102:
5099:
5097:
5094:
5092:
5089:
5087:
5084:
5083:
5081:
5077:
5071:
5068:
5066:
5063:
5061:
5058:
5056:
5053:
5051:
5048:
5047:
5045:
5041:
5035:
5032:
5030:
5027:
5025:
5022:
5020:
5017:
5015:
5012:
5010:
5007:
5005:
5002:
5000:
4997:
4995:
4992:
4990:
4987:
4985:
4982:
4980:
4977:
4975:
4972:
4970:
4967:
4965:
4962:
4960:
4957:
4955:
4952:
4950:
4947:
4945:
4942:
4940:
4937:
4935:
4932:
4930:
4927:
4925:
4922:
4920:
4917:
4915:
4912:
4910:
4907:
4905:
4902:
4900:
4897:
4895:
4892:
4890:
4887:
4885:
4882:
4880:
4877:
4875:
4872:
4870:
4867:
4865:
4862:
4860:
4857:
4855:
4852:
4850:
4847:
4845:
4842:
4840:
4837:
4835:
4832:
4830:
4827:
4825:
4822:
4820:
4817:
4815:
4812:
4810:
4807:
4805:
4802:
4800:
4797:
4795:
4792:
4790:
4787:
4785:
4782:
4780:
4777:
4775:
4772:
4770:
4767:
4765:
4762:
4760:
4757:
4755:
4752:
4750:
4747:
4745:
4742:
4740:
4737:
4735:
4732:
4730:
4727:
4725:
4722:
4720:
4717:
4715:
4712:
4710:
4707:
4705:
4702:
4700:
4697:
4695:
4692:
4690:
4687:
4685:
4682:
4680:
4677:
4675:
4672:
4670:
4667:
4665:
4662:
4660:
4657:
4655:
4652:
4650:
4647:
4645:
4642:
4640:
4637:
4635:
4632:
4630:
4627:
4625:
4622:
4620:
4617:
4615:
4612:
4611:
4609:
4607:
4603:
4597:
4594:
4592:
4589:
4587:
4584:
4582:
4579:
4577:
4574:
4573:
4571:
4569:
4565:
4562:
4560:
4556:
4546:
4543:
4541:
4538:
4536:
4533:
4531:
4528:
4526:
4523:
4521:
4518:
4516:
4513:
4511:
4508:
4506:
4503:
4501:
4498:
4496:
4493:
4491:
4488:
4486:
4483:
4481:
4478:
4476:
4473:
4471:
4468:
4467:
4465:
4463:
4459:
4455:
4445:
4442:
4440:
4437:
4435:
4432:
4430:
4427:
4425:
4422:
4420:
4417:
4415:
4412:
4410:
4407:
4405:
4402:
4400:
4397:
4395:
4392:
4390:
4387:
4385:
4382:
4381:
4379:
4375:
4369:
4366:
4364:
4361:
4359:
4358:99109 (Shama)
4356:
4354:
4351:
4349:
4346:
4344:
4341:
4339:
4336:
4334:
4331:
4330:
4328:
4326:
4322:
4316:
4313:
4311:
4308:
4307:
4305:
4303:
4299:
4293:
4290:
4288:
4285:
4283:
4280:
4278:
4275:
4273:
4270:
4268:
4265:
4264:
4262:
4260:
4256:
4250:
4249:
4245:
4243:
4242:
4238:
4236:
4235:
4231:
4229:
4228:
4224:
4222:
4219:
4217:
4214:
4212:
4209:
4207:
4204:
4202:
4199:
4197:
4194:
4192:
4189:
4187:
4184:
4182:
4179:
4177:
4174:
4172:
4169:
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4164:
4162:
4159:
4157:
4154:
4152:
4149:
4147:
4144:
4142:
4139:
4137:
4134:
4132:
4129:
4127:
4124:
4122:
4119:
4117:
4114:
4112:
4109:
4107:
4104:
4102:
4099:
4097:
4094:
4092:
4089:
4087:
4084:
4082:
4079:
4077:
4074:
4072:
4069:
4067:
4064:
4062:
4059:
4057:
4054:
4052:
4049:
4047:
4044:
4042:
4039:
4037:
4034:
4032:
4029:
4027:
4024:
4022:
4019:
4017:
4014:
4012:
4009:
4007:
4004:
4002:
3999:
3997:
3994:
3992:
3989:
3987:
3984:
3982:
3979:
3977:
3974:
3972:
3969:
3967:
3964:
3962:
3959:
3957:
3954:
3952:
3949:
3947:
3944:
3942:
3939:
3937:
3934:
3932:
3929:
3927:
3924:
3922:
3919:
3917:
3914:
3912:
3909:
3907:
3904:
3902:
3899:
3897:
3894:
3892:
3889:
3887:
3884:
3883:
3881:
3879:
3875:
3869:
3866:
3864:
3861:
3859:
3856:
3854:
3851:
3849:
3846:
3844:
3841:
3839:
3836:
3834:
3831:
3829:
3826:
3824:
3821:
3819:
3816:
3814:
3811:
3809:
3806:
3804:
3801:
3799:
3798:
3793:
3791:
3788:
3786:
3783:
3781:
3778:
3776:
3773:
3771:
3770:
3765:
3763:
3760:
3758:
3755:
3753:
3750:
3748:
3745:
3744:
3742:
3740:
3736:
3733:
3731:
3727:
3721:
3718:
3716:
3713:
3712:
3709:
3705:
3698:
3693:
3691:
3686:
3684:
3679:
3678:
3675:
3660:
3656:
3652:
3651:
3646:
3643:
3641:
3638:
3636:
3633:
3631:
3628:
3627:
3626:
3625:
3621:
3618:
3616:
3613:
3611:
3608:
3607:
3594:
3590:
3586:
3582:
3575:
3567:
3561:
3557:
3552:
3551:
3542:
3535:
3531:
3527:
3518:
3503:
3497:
3495:
3487:
3483:
3482:
3477:
3476:Scott, Robert
3473:
3469:
3460:
3452:
3446:
3442:
3441:
3433:
3431:
3423:
3419:
3418:
3413:
3408:
3400:
3396:
3392:
3388:
3381:
3367:
3363:
3357:
3350:
3346:
3339:
3334:
3329:
3324:
3319:
3314:
3310:
3306:
3305:
3300:
3298:
3292:
3286:
3277:
3272:
3268:
3264:
3260:
3256:
3252:
3245:
3231:on 2017-01-09
3230:
3226:
3222:
3215:
3201:
3195:
3181:on 2020-11-21
3180:
3176:
3170:
3162:
3158:
3154:
3150:
3143:
3135:
3133:9789812834263
3129:
3125:
3121:
3117:
3113:
3110:: 2594–2596.
3109:
3102:
3088:
3082:
3075:
3071:
3065:
3051:
3047:
3041:
3033:
3027:
3023:
3019:
3015:
3008:
2993:
2987:
2969:
2963:
2948:
2942:
2934:
2930:
2926:
2922:
2918:
2914:
2909:
2904:
2900:
2896:
2889:
2881:
2877:
2873:
2869:
2862:
2860:
2858:
2856:
2847:
2843:
2839:
2835:
2831:
2827:
2822:
2817:
2813:
2809:
2802:
2800:
2798:
2789:
2785:
2781:
2777:
2773:
2769:
2764:
2759:
2755:
2751:
2744:
2742:
2733:
2729:
2724:
2719:
2715:
2711:
2706:
2701:
2697:
2693:
2689:
2682:
2674:
2670:
2666:
2662:
2658:
2654:
2649:
2644:
2640:
2636:
2629:
2621:
2617:
2613:
2609:
2605:
2601:
2596:
2591:
2587:
2583:
2575:
2573:
2571:
2569:
2567:
2565:
2563:
2554:
2550:
2546:
2542:
2537:
2532:
2528:
2524:
2516:
2507:
2502:
2498:
2494:
2490:
2486:
2482:
2475:
2473:
2471:
2469:
2461:
2457:
2451:
2447:
2440:
2436:
2431:
2426:
2422:
2418:
2413:
2408:
2404:
2400:
2399:
2394:
2392:
2386:
2380:
2378:
2376:
2374:
2365:
2361:
2357:
2353:
2349:
2345:
2340:
2335:
2331:
2327:
2320:
2311:
2306:
2302:
2298:
2293:
2288:
2284:
2280:
2276:
2269:
2267:
2265:
2263:
2261:
2252:
2248:
2244:
2240:
2236:
2232:
2227:
2222:
2218:
2214:
2213:
2204:
2202:
2193:
2189:
2185:
2181:
2174:
2166:
2162:
2158:
2154:
2147:
2145:
2143:
2141:
2131:
2126:
2122:
2118:
2114:
2110:
2106:
2099:
2097:
2095:
2093:
2091:
2082:
2076:
2072:
2068:
2064:
2060:
2056:
2052:
2045:
2043:
2034:
2030:
2026:
2022:
2018:
2014:
2009:
2004:
2000:
1996:
1989:
1987:
1980:
1975:
1971:
1967:
1963:
1959:
1955:
1950:
1945:
1941:
1937:
1933:
1926:
1924:
1922:
1920:
1918:
1909:
1901:
1897:
1896:
1890:
1883:
1879:
1869:
1866:
1865:
1859:
1857:
1853:
1848:
1845:
1840:
1836:
1832:
1828:
1825:
1821:
1817:
1813:
1810:
1806:
1803:
1799:
1795:
1791:
1787:
1783:
1781:
1778:
1774:
1770:
1766:
1762:
1758:
1754:
1745:
1743:
1739:
1735:
1730:
1728:
1724:
1720:
1716:
1711:
1709:
1705:
1701:
1697:
1693:
1688:
1685:
1676:
1667:
1665:
1660:
1656:
1651:
1649:
1645:
1639:
1637:
1633:
1629:
1625:
1621:
1617:
1611:
1609:
1604:
1600:
1596:
1592:
1588:
1584:
1580:
1576:
1572:
1568:
1559:
1555:
1552:
1548:
1539:
1530:
1528:
1524:
1520:
1516:
1512:
1508:
1504:
1500:
1491:
1489:
1485:
1481:
1477:
1473:
1469:
1464:
1457:
1455:
1451:
1447:
1443:
1442:main-sequence
1439:
1435:
1431:
1427:
1423:
1419:
1415:
1411:
1408:. It has the
1407:
1403:
1399:
1396:
1395:constellation
1392:
1384:
1381:
1379:
1378:
1375:
1372:
1370:
1369:
1365:
1364:
1359:
1355:
1352: 98966,
1351:
1348: 87884,
1347:
1341:
1336:
1332:
1328:
1325: 98967,
1324:
1321: 49669,
1320:
1317: 87901,
1316:
1312:
1306:
1301:
1297:
1291:
1286:
1282:
1278:
1274:
1268:
1265:
1261:
1258:
1254:
1252:
1251:
1247:
1246:
1243:
1234:
1232:
1231:
1227:
1226:
1223:
1214:
1212:
1211:
1207:
1206:
1201:
1198:
1194:
1192:
1191:
1187:
1186:
1183:
1179:
1177:
1176:
1172:
1171:
1168:
1164:
1162:
1160:
1156:
1152:
1151:
1148:
1139:
1137:
1136:
1132:
1131:
1128:
1119:
1117:
1116:
1112:
1111:
1108:
1099:
1097:
1096:
1092:
1091:
1086:
1082:
1079:
1068:
1066:
1065:
1061:
1060:
1057:
1041:
1039:
1038:
1034:
1033:
1030:
1014:
1012:
1011:
1007:
1006:
1001:
998:
994:
992:
991:
987:
986:
975:
973:
971:
967:
963:
959:
958:
954:
952:
951:
947:
946:
943:
939:
937:
936:
932:
931:
928:
924:
922:
921:
917:
916:
913:
902:
900:
898:
894:
890:
889:
886:
870:
868:
867:
863:
862:
859:
851:(polar)
835:
833:
832:
828:
827:
824:
805:
803:
802:
798:
797:
792:
787:
776:
767:
766:
762:
761:
757:
755:
753:
749:
748:
743:
739:
729:
726:
724:
719:
718:
708:
706:
704:
700:
699:
695:
693:
690:
689:
685:
683:
680:
679:
676:
672:
668:
666:
660:
656:
655:
651:
646:
642:
640:
639:
635:
634:
631:
627:
625:
623:
619:
618:
615:
611:
595:
591:
576:
574:
572:
571:Proper motion
568:
567:
563:
561:
555:
551:
550:
545:
541:
539:
533:
529:
528:
524:
519:
515:
513:
512:
508:
507:
504:
500:
498:
496:
492:
491:
488:
484:
468:
464:
449:
447:
445:
444:Proper motion
441:
440:
429:
427:
421:
417:
416:
411:
408:
404:
400:
398:
394:
393:
389:
387:
383:
382:
378:
376:
373:
372:
369:
368:Main sequence
366:
364:
361:
360:
355:
351:
349:
346:
345:
341:
339:
335:
334:
330:
328:
324:
323:
319:
317:
314:
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264:
260:10 08 12.8/14
258:
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186:
144:
137:
98:
93:
91:
90:Pronunciation
88:
87:
84:
81:
79:
78:
77:Constellation
74:
73:
69:
65:
59:
47:
40:
30:
22:
5244:(early July)
5229:
4439:PSR B0950+08
4434:PSR B0943+10
4246:
4239:
4232:
4225:
3796:
3775:ζ (Adhafera)
3768:
3752:β (Denebola)
3746:
3662:. Retrieved
3658:
3584:
3580:
3574:
3549:
3541:
3517:
3505:. Retrieved
3479:
3459:
3439:
3415:
3407:
3390:
3386:
3380:
3369:. Retrieved
3365:
3356:
3308:
3302:
3296:
3285:
3258:
3254:
3244:
3233:. Retrieved
3229:the original
3224:
3214:
3203:. Retrieved
3200:"In the Sky"
3194:
3183:. Retrieved
3179:the original
3169:
3152:
3148:
3142:
3107:
3101:
3090:. Retrieved
3081:
3064:
3053:. Retrieved
3049:
3040:
3013:
3007:
2995:. Retrieved
2986:
2974:. Retrieved
2962:
2950:. Retrieved
2941:
2901:(A138): 21.
2898:
2894:
2888:
2871:
2867:
2811:
2807:
2753:
2749:
2695:
2691:
2681:
2638:
2634:
2628:
2585:
2581:
2526:
2522:
2515:
2488:
2484:
2402:
2396:
2390:
2329:
2325:
2319:
2282:
2278:
2216:
2210:
2183:
2179:
2173:
2156:
2152:
2112:
2108:
2054:
2050:
1998:
1994:
1939:
1935:
1893:
1882:
1849:
1811:
1804:
1797:
1789:
1784:
1752:
1751:
1731:
1712:
1689:
1681:
1663:
1652:
1640:
1612:
1603:Solar System
1564:
1544:
1526:
1521:organized a
1510:
1503:Alpha Leonis
1502:
1498:
1497:
1494:Nomenclature
1476:Gamma Leonis
1458:
1429:
1425:
1422:Alpha Leonis
1421:
1413:
1390:
1389:
1366:
1334:
1299:
1287: 7654,
1283: 3982,
1279: 9316,
1248:
1228:
1208:
1188:
1173:
1158:
1153:
1133:
1113:
1093:
1062:
1035:
1008:
988:
969:
965:
960:
948:
933:
918:
896:
891:
864:
829:
799:
763:
752:Eccentricity
750:
737:
721:
714:0.002 d
701:
691:
681:
657:
636:
620:
569:
552:
530:
509:
493:
442:
418:
320:B8 IVn
267:
251:
243:
217:
210:10 08 22.311
201:
193:
75:
5316:Outer space
5238:(early May)
5211:designation
4530:HD 102272 b
4485:DP Leonis b
3808:μ (Rasalas)
3785:θ (Chertan)
3757:γ (Algieba)
3747:α (Regulus)
3664:December 1,
3655:"Regulus 3"
3587:(1): 9–28.
2491:: 643–711.
1839:kabbalistic
1827:astrologers
1816:royal stars
1786:Babylonians
1696:white dwarf
1684:star system
1628:163 Erigone
1620:166 Rhodope
1533:Observation
1468:Zeta Leonis
1450:light years
1446:white dwarf
1434:star system
1416:, which is
1412:designated
1356: 12714
1329: 12716
1313: 380,
1292:J10084+1158
1255:3,242
1250:Temperature
1195:−0.21
1190:Metallicity
1180:4,885
1175:Temperature
1064:Temperature
940:+0.21
935:Metallicity
920:Temperature
758:0 (assumed)
397:color index
386:color index
357:Regulus BC
338:color index
327:color index
288:8.13/13.50
269:Declination
219:Declination
5326:Categories
4510:HD 89345 b
4505:HD 89307 b
4500:HD 88133 b
4495:HD 81040 b
4480:υ Leonis b
4475:μ Leonis b
4470:γ Leonis b
4462:Exoplanets
4389:Gliese 408
4384:BD+20 2457
3803:λ (Alterf)
3769:(Algenubi)
3659:SolStation
3466:βασιλίσκος
3371:2023-12-15
3318:1804.09365
3235:2012-09-05
3205:2019-06-23
3185:2019-06-23
3092:2007-10-16
3055:2019-06-23
2763:1804.06576
2705:1712.08109
2412:2012.01533
2332:(5): 331.
2292:2009.02409
1910:required.)
1874:References
1837:, and the
1788:called it
1484:Eta Leonis
1235:0.37
1157:(log
1140:0.50
1135:Luminosity
1120:0.83
983: km/s
955:15.9 hours
895:(log
866:Luminosity
735:0.17
669:6.20/11.56
437: km/s
407:Astrometry
352:Suspected
298:Regulus A
244:Regulus BC
5292:Astronomy
3878:Flamsteed
3823:ο (Subra)
3762:δ (Zosma)
3622:Pictures:
3528: in
2908:1103.4651
2821:0904.0395
2732:119427037
2698:(1): 16.
2673:119512018
2553:0004-637X
2536:1105.0740
2529:(2): 68.
2439:227254300
2364:119257644
2339:1108.4971
2251:118491233
2226:0806.3473
2186:: 02025.
2115:: 75–84.
2008:0901.1206
1949:0708.1752
1889:"regulus"
1822:known to
1777:Nakshatra
1700:Keplerian
1591:asteroids
1472:Mu Leonis
1452:from the
1426:Alpha Leo
1418:Latinized
1406:night sky
1335:α Leo B/C
1215:0.3
1165:4.4
1100:0.8
774:(primary)
692:Companion
284: (V)
234: (V)
194:Regulus A
5146:Category
5126:UGC 6697
5121:UGC 6614
5043:Numbered
4559:Galaxies
4310:4253 (p)
4259:Variable
2933:56118016
2846:15519189
2788:53560815
2033:18370219
1974:18759600
1862:See also
1852:MUL.APIN
1824:medieval
1802:Sogdiana
1692:subgiant
1632:New York
1571:occulted
1567:ecliptic
1499:α Leonis
1488:asterism
1414:α Leonis
1342:+12°2147
1307:+12°2149
1241:☉
1221:☉
1146:☉
1126:☉
1106:☉
1055:☉
1028:☉
995:≳1
950:Rotation
884:☉
857:☉
822:☉
741:☉
661: (M
638:Distance
622:Parallax
582:−254.399
534: (M
511:Distance
495:Parallax
309:Subgiant
27:Regulus
5278:Portals
5096:IC 2628
5091:IC 2498
4568:Messier
4399:GJ 3685
3589:Bibcode
3530:Liddell
3484:at the
3412:regulus
3395:Bibcode
3393:: 183.
3323:Bibcode
3263:Bibcode
3157:Bibcode
3112:Bibcode
2997:28 July
2976:28 July
2913:Bibcode
2876:Bibcode
2874:: 186.
2826:Bibcode
2768:Bibcode
2710:Bibcode
2653:Bibcode
2620:6776360
2600:Bibcode
2493:Bibcode
2454:.
2417:Bibcode
2344:Bibcode
2297:Bibcode
2231:Bibcode
2188:Bibcode
2161:Bibcode
2117:Bibcode
2059:Bibcode
2057:: L27.
2013:Bibcode
1954:Bibcode
1841:symbol
1835:mugwort
1831:granite
1753:Rēgulus
1608:Trojans
1583:Mercury
1573:by the
1527:Regulus
1511:Rēgulus
1404:in the
1391:Regulus
1374:Regulus
1300:α Leo A
1203:α Leo C
1088:α Leo B
794:α Leo A
789:Details
682:Primary
455:−248.73
68:Equinox
4540:K2-18b
4368:102272
4248:52 LMi
4241:49 LMi
4234:18 LMi
4221:95 (o)
4191:87 (e)
4141:73 (n)
4126:69 (p)
4111:65 (p)
4101:62 (p)
4096:61 (p)
4091:60 (b)
4086:59 (c)
4081:58 (d)
4056:53 (l)
4051:52 (k)
4046:51 (m)
3971:31 (A)
3956:22 (g)
3931:15 (f)
3562:
3524:καρδία
3507:20 Feb
3447:
3349:VizieR
3311:. A1.
3130:
3028:
2952:22 May
2931:
2844:
2786:
2730:
2671:
2618:
2551:
2460:VizieR
2437:
2405:: A1.
2362:
2249:
2077:
2031:
1972:
1809:Persia
1790:Sharru
1765:Arabic
1719:oblate
1664:before
1482:, and
1368:SIMBAD
1230:Radius
1115:Radius
1076:
1070:20,000
1049:
1037:Radius
1022:
910:
878:
831:Radius
816:
710:40.102
703:Period
608:
600:
588:
580:
481:
473:
461:
453:
401:+0.86
390:+0.51
342:–0.11
331:–0.36
70:J2000
5304:Stars
5208:Bayer
5192:Stars
5111:Leo T
5106:Leo P
5079:Other
4414:K2-18
4404:HVS 7
4377:Other
4353:97658
4343:89307
4338:88133
4333:81040
4227:6 LMi
3891:6 (h)
3739:Bayer
3730:Stars
3556:255–6
3534:Scott
3343:
3313:arXiv
3155:: 1.
2971:(PDF)
2929:S2CID
2903:arXiv
2842:S2CID
2816:arXiv
2784:S2CID
2758:arXiv
2728:S2CID
2700:arXiv
2669:S2CID
2643:arXiv
2616:S2CID
2590:arXiv
2531:arXiv
2435:S2CID
2407:arXiv
2360:S2CID
2334:arXiv
2287:arXiv
2247:S2CID
2221:arXiv
2159:: 0.
2029:S2CID
2003:arXiv
1970:S2CID
1944:arXiv
1904:
1856:Lugal
1812:Miyan
1798:Maghā
1794:India
1780:Magha
1771:. In
1761:Greek
1757:Latin
1715:Sun's
1659:Venus
1648:LASCO
1587:Venus
1515:Latin
1430:α Leo
1074:4,000
1047:0.011
1043:0.061
812:−0.01
810:+0.08
675:Orbit
606:0.027
602:8.127
598:Dec.:
586:0.028
542:–0.57
471:Dec.:
238:1.40
64:Epoch
5034:4005
5029:3954
5024:3947
5019:3937
5014:3925
5009:3908
5004:3902
4999:3900
4994:3886
4989:3884
4984:3883
4979:3875
4974:3873
4969:3868
4964:3867
4959:3864
4954:3862
4949:3861
4944:3860
4939:3859
4934:3857
4929:3851
4924:3845
4919:3844
4914:3842
4909:3841
4904:3840
4899:3837
4894:3821
4889:3816
4884:3810
4879:3805
4874:3801
4869:3800
4864:3799
4859:3710
4854:3705
4849:3697
4844:3686
4839:3678
4834:3666
4829:3664
4824:3647
4819:3640
4814:3632
4809:3628
4804:3608
4799:3607
4794:3605
4789:3602
4784:3599
4779:3598
4774:3596
4769:3593
4764:3535
4759:3521
4754:3506
4749:3501
4744:3489
4739:3455
4734:3447
4729:3426
4724:3412
4719:3384
4714:3377
4709:3370
4704:3367
4699:3362
4694:3357
4689:3301
4684:3274
4679:3239
4674:3227
4669:3226
4664:3193
4659:3190
4654:3187
4649:3185
4644:3177
4639:3048
4634:3041
4629:2964
4624:2911
4619:2906
4614:2903
4409:K2-3
3666:2005
3620:APOD
3560:ISBN
3532:and
3509:2024
3445:ISBN
3297:Gaia
3153:5987
3128:ISBN
3072:and
3068:See
3026:ISBN
2999:2016
2978:2016
2954:2016
2549:ISSN
2391:Gaia
2157:2237
2075:ISBN
1805:Magh
1644:SOHO
1634:and
1585:and
1575:Moon
1210:Mass
1095:Mass
1020:0.10
1016:0.31
1010:Mass
908:0.09
904:3.54
849:0.06
845:3.14
841:0.08
837:4.16
807:3.44
801:Mass
784:km/s
782:0.12
778:7.58
731:6.00
479:0.21
475:5.59
459:0.35
435:0.09
431:4.39
395:B−V
384:U−B
336:B−V
325:U−B
5060:III
4606:NGC
4596:105
3585:108
3420:on
3347:at
3333:doi
3309:616
3271:doi
3259:122
3120:doi
3018:doi
2921:doi
2899:530
2872:257
2834:doi
2812:698
2776:doi
2718:doi
2696:155
2661:doi
2639:129
2608:doi
2586:628
2541:doi
2527:732
2501:doi
2458:at
2446:doi
2425:doi
2403:649
2352:doi
2305:doi
2283:902
2239:doi
2217:682
2125:doi
2113:124
2067:doi
2055:355
2021:doi
1999:694
1962:doi
1940:474
1755:is
1646:'s
1513:is
1461:176
1454:Sun
1428:or
1420:to
1398:Leo
1354:LTT
1350:SAO
1327:LTT
1323:SAO
1319:HIP
1311:FK5
1290:WDS
1285:ADS
1197:dex
1167:cgs
997:Gyr
990:Age
977:318
942:dex
912:cgs
872:314
754:(e)
725:(a)
705:(P)
630:mas
624:(π)
610:mas
590:mas
578:RA:
573:(μ)
503:mas
497:(π)
483:mas
463:mas
451:RA:
446:(μ)
83:Leo
5328::
5065:IV
5055:II
4591:96
4586:95
4581:66
4576:65
4325:HD
4302:HR
4292:EE
4287:DP
4282:CW
4277:CN
4272:AD
4216:93
4211:92
4206:90
4201:89
4196:88
4186:86
4181:85
4176:83
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