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Adrastea (moon)

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2035: 1315: 706:. This appears to consist primarily of material that is ejected from the surfaces of Jupiter's four small inner satellites by meteorite impacts. It is easy for the impact ejecta to be lost from these satellites into space. This is due to the satellites' low density and their surfaces lying close to the edge of their 527: 620:
Adrastea has an irregular shape and measures 20×16×14 km across. A surface area estimate would be between 840 and 1,600 (~1,200) km. This makes it the smallest of the four inner moons. The bulk, composition, and mass of Adrastea are not known, but assuming that its mean density is like that of
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It seems that Adrastea is the most copious source of this ring material, as evidenced by the densest ring (the main ring) being located at and within Adrastea's orbit. More precisely, the orbit of Adrastea lies near the outer edge of Jupiter's main ring. The exact extent of visible ring material
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Anderson, J. D.; Johnson, T. V.; Schubert, G.; Asmar, S.; Jacobson, R. A.; Johnston, D.; Lau, E. L.; Lewis, G.; Moore, W. B.; Taylor, A.; Thomas, P. C.; Weinwurm, G. (27 May 2005). "Amalthea's Density is Less Than That of Water".
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Burns, Joseph A.; Showalter, Mark R.; Hamilton, Douglas P.; Nicholson, Philip D.; de Pater, Imke; Ockert-Bell, Maureen E.; Thomas, Peter C. (14 May 1999). "The Formation of Jupiter's Faint Rings".
671:, Adrastea rotates synchronously with its orbital period, keeping one face always looking toward the planet. Its long axis is aligned towards Jupiter, this being the lowest energy configuration. 1303: 1236:
Thomas, P. C.; Burns, J. A.; Rossier, L.; Simonelli, D.; Veverka, J.; Chapman, C. R.; Klaasen, K.; Johnson, T. V.; Belton, M. J. S.; Galileo Solid State Imaging Team (September 1998).
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are slowly causing its orbit to decay so that it will one day impact Jupiter. If its density is similar to Amalthea's then its orbit would actually lie within the fluid
158: 558:. Although it appeared only as a dot, it was the first moon to be discovered by an interplanetary spacecraft. Soon after its discovery, two other of the inner 543: 608:, it is almost entirely focused on observations of Jupiter itself. However, if all goes well, it should be able to capture some limited images of the moons 1082:
Evans, M. W.; Porco, C. C.; Hamilton, D. P. (September 2002). "The Orbits of Metis and Adrastea: The Origin and Significance of their Inclinations".
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Burns, Joseph A.; Simonelli, Damon P.; Showalter, Mark R.; Hamilton, Douglas P.; Porco, Carolyn C.; Throop, Henry; Esposito, Larry W. (2004).
625:, around 0.86 g/cm, its mass can be estimated at 2 × 10 kg. Amalthea's density implies that the moon is composed of water 2076: 652:
at 70,200 mph at a radius of about 129,000 km (80,000 mi) (1.806 Jupiter radii) at the exterior edge of the planet's
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was able to determine the moon's shape in 1998, but the images remain poor. In 1983, Adrastea was officially named after the Greek nymph
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Ockert-Bell, M. E.; Burns, J. A.; Daubar, I. J.; Thomas, P. C.; Veverka, J.; Belton, M. J. S.; Klaasen, K. P. (1 April 1999).
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Jewitt, David C.; Danielson, G. Edward; Synnott, Stephen P. (November 23, 1979). "Discovery of a New Jupiter Satellite".
65: 1360: 2020: 510:, very little is known about the moon's physical characteristics other than its size and the fact that it is 722:(which reveals much bigger particles) there appears to also be a narrow ringlet outside Adrastea's orbit. 645: 453: 1049: 2061: 2039: 1353: 1339: 495:
known to orbit its planet in less than the length of that planet's day. It orbits at the edge of
349: 319: 308: 653: 496: 1910: 1335: 1249: 1214: 1112: 1091: 1060: 1020: 975: 657: 584: 534:. Adrastea is the fainter dot, in the very middle, straddling the line of the Jovian rings. 504: 355: 234: 48: 8: 694:. However, since it is not breaking up, it must still lie outside its rigid Roche limit. 636:
No surface details of Adrastea are known, due to the low resolution of available images.
485: 279: 1253: 1218: 1178: 1161: 1116: 1095: 1064: 1024: 979: 1136: 999: 687: 592: 577: 1203:"The Structure of Jupiter's Ring System as Revealed by the Galileo Imaging Experiment" 1989: 1797: 1128: 1068: 1036: 991: 679: 600: 463: 291: 907: 2015: 1689: 1664: 1639: 1376: 1257: 1222: 1140: 1120: 1028: 983: 715: 703: 559: 500: 411: 208: 166: 104: 1032: 1003: 470:, rather than through a telescope. It was officially named after the mythological 1947: 1940: 1915: 1757: 1718: 1644: 1575: 1519: 1471: 1454: 1447: 1409: 1124: 622: 1984: 1964: 1901: 1832: 1713: 1684: 1629: 1604: 1594: 1507: 1424: 511: 247: 2055: 1969: 1935: 1837: 1812: 1787: 1782: 1706: 1694: 1654: 1514: 1481: 1440: 668: 268: 20: 987: 1979: 1871: 1851: 1844: 1827: 1817: 1762: 1669: 1624: 1585: 1557: 1524: 1414: 1399: 1262: 1237: 1227: 1202: 1132: 1040: 995: 683: 609: 567: 563: 539: 492: 73: 27: 526: 1999: 1994: 1974: 1920: 1891: 1856: 1807: 1772: 1733: 1723: 1679: 1634: 1619: 1614: 1495: 1490: 719: 707: 691: 661: 390: 1323:
was created from a revision of this article dated 1 March 2021
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probe photographs taken on July 8, 1979, and received the designation
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For the moon of Jupiter known by this name between 1955 and 1975, see
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orbiter, which arrived at Jupiter in 2016, has a camera called
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Hansen, C. J.; Orton, G. S. American Geophysical Union 12/2015
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and is thought to be the main contributor of material to the
570:) were observed in the images taken a few months earlier by 588: 478: 438: 423: 193: 178: 131: 116: 42: 644:
Adrastea is the smallest and second-closest member of the
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to be discovered from images taken by an interplanetary
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Discovery image of Adrastea, taken on July 8, 1979, by
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Listed in increasing approximate distance from Jupiter
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relative to Jupiter's equator of 0.03°, respectively.
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JunoCam: Science and Outreach Opportunities with Juno
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(September 30, 1983). 633:of 10–15%, and Adrastea may be similar. 525: 491:Adrastea is one of the few moons in the 2067:Astronomical objects discovered in 1979 1238:"The Small Inner Satellites of Jupiter" 1148:Marsden, Brian G. (February 25, 1980). 313:20 × 16 × 14 km 2054: 1349: 1176: 1147: 880: 865: 760:as "Adrastia" in Noah Webster (1884) 1375: 54:between November 1996 and June 1997 13: 2077:Discoveries by G. Edward Danielson 1301: 1179:"Satellites of Jupiter and Saturn" 674:The orbit of Adrastea lies inside 14: 2093: 1271: 698:Relationship with Jupiter's rings 2034: 2033: 1313: 410: 165: 103: 26:For the main-belt asteroid, see 1282:NASA's Solar System Exploration 901: 2072:Discoveries by David C. Jewitt 766: 754: 1: 1033:10.1126/science.284.5417.1146 950:Ockert-Bell Burns et al. 1999 748: 656:. Its orbit has a very small 646:inner Jovian satellite family 462:in 1979, making it the first 1125:10.1126/science.206.4421.951 1050:"Jupiter's Ring-Moon System" 923:Anderson Johnson et al. 2005 896:Jewitt Danielson et al. 1979 7: 2082:Moons with a prograde orbit 935:Burns Showalter et al. 1999 824:Burns Simonelli et al. 2004 538:Adrastea was discovered by 47:Image of Adrastea taken by 10: 2098: 2021:Jupiter's moons in fiction 522:Discovery and observations 25: 18: 2029: 2008: 1900: 1732: 1584: 1568: 1543: 1480: 1464: 1423: 1392: 1383: 399: 389: 373: 361: 347: 335: 317: 307: 302: 290: 278: 265: 248:Orbital period (sidereal) 245: 233: 214: 207: 157: 142: 98: 93: 85: 64: 59: 40: 851:Thomas Burns et al. 1998 725: 660:of around 0.0015 and an 639: 616:Physical characteristics 303:Physical characteristics 988:10.1126/science.1110422 793:Evans Porco et al. 2002 716:forward-scattered light 481:—the equivalent of the 474:, foster mother of the 350:Synodic rotation period 209:Orbital characteristics 1309: 1289:Listen to this article 1263:10.1006/icar.1998.5976 1228:10.1006/icar.1998.6072 686:'s), and as a result, 535: 454:inner moons of Jupiter 286:(to Jupiter's equator) 1308: 529: 1340:More spoken articles 720:back-scattered light 555:S/1979 J 1 342:≈ 2345 km 1254:1998Icar..135..360T 1219:1999Icar..138..188O 1117:1979Sci...206..951J 1096:2002DPS....34.2403E 1065:2004jpsm.book..241B 1025:1999Sci...284.1146B 1019:(5417): 1146–1150. 980:2005Sci...308.1291A 974:(5726): 1291–1293. 772:A.H. Clough (1905) 544:G. Edward Danielson 497:Jupiter's main ring 86:Discovery date 78:G. Edward Danielson 37: 1310: 1150:"Editorial Notice" 587:, the daughter of 536: 66:Discovered by 35: 2049: 2048: 1306: 1197:(naming the moon) 1074:978-0-521-81808-7 776:, vol. 3, p. 238. 680:synchronous orbit 464:natural satellite 446:), also known as 403: 402: 292:Satellite of 2089: 2062:Moons of Jupiter 2037: 2036: 2016:Rings of Jupiter 1377:Moons of Jupiter 1370: 1363: 1356: 1347: 1346: 1330: 1328: 1317: 1316: 1307: 1297: 1295: 1290: 1278:Adrastea Profile 1267: 1265: 1232: 1230: 1196: 1194: 1193: 1172: 1170: 1169: 1160:. Archived from 1144: 1099: 1078: 1054: 1044: 1007: 953: 947: 938: 932: 926: 920: 911: 905: 899: 893: 884: 878: 869: 863: 854: 848: 827: 821: 796: 790: 777: 770: 764: 758: 742: 739: 682:radius (as does 560:moons of Jupiter 556: 501:rings of Jupiter 450: 445: 444: 441: 440: 437: 434: 431: 428: 425: 422: 419: 416: 385: 383: 343: 331: 329: 259: 257: 241: 229: 227: 203: 202: 199: 198: 195: 192: 189: 186: 183: 180: 177: 174: 171: 138: 137: 134: 133: 130: 127: 124: 121: 118: 115: 112: 109: 45: 38: 34: 2097: 2096: 2092: 2091: 2090: 2088: 2087: 2086: 2052: 2051: 2050: 2045: 2025: 2004: 1896: 1728: 1580: 1564: 1544:Carpo group (2) 1539: 1476: 1460: 1419: 1388: 1379: 1374: 1344: 1343: 1332: 1326: 1324: 1321:This audio file 1318: 1311: 1302: 1299: 1293: 1292: 1288: 1274: 1191: 1189: 1167: 1165: 1075: 1052: 956: 948: 941: 933: 929: 921: 914: 906: 902: 894: 887: 879: 872: 864: 857: 849: 830: 822: 799: 791: 780: 771: 767: 759: 755: 751: 746: 745: 740: 733: 728: 704:Jupiter's rings 700: 642: 618: 554: 540:David C. Jewitt 524: 448: 413: 409: 381: 379: 366: 352: 341: 327: 325: 322: 285: 271: 260: 255: 253: 250: 239: 225: 223: 220: 168: 164: 145: 106: 102: 81: 74:David C. Jewitt 55: 31: 24: 17: 16:Moon of Jupiter 12: 11: 5: 2095: 2085: 2084: 2079: 2074: 2069: 2064: 2047: 2046: 2044: 2043: 2030: 2027: 2026: 2024: 2023: 2018: 2012: 2010: 2006: 2005: 2003: 2002: 1997: 1992: 1987: 1982: 1977: 1972: 1967: 1962: 1957: 1952: 1943: 1938: 1933: 1928: 1923: 1918: 1913: 1907: 1905: 1902:Pasiphae group 1898: 1897: 1895: 1894: 1889: 1884: 1879: 1874: 1869: 1864: 1859: 1854: 1849: 1840: 1835: 1830: 1825: 1820: 1815: 1810: 1805: 1800: 1795: 1790: 1785: 1780: 1775: 1770: 1765: 1760: 1755: 1750: 1745: 1739: 1737: 1730: 1729: 1727: 1726: 1721: 1716: 1711: 1702: 1697: 1692: 1687: 1685:Jupiter LXVIII 1682: 1677: 1672: 1667: 1662: 1657: 1652: 1647: 1642: 1637: 1632: 1627: 1622: 1617: 1612: 1607: 1602: 1597: 1591: 1589: 1582: 1581: 1579: 1578: 1572: 1570: 1566: 1565: 1563: 1562: 1553: 1547: 1545: 1541: 1540: 1538: 1537: 1532: 1527: 1522: 1517: 1512: 1503: 1498: 1493: 1487: 1485: 1478: 1477: 1475: 1474: 1468: 1466: 1462: 1461: 1459: 1458: 1451: 1444: 1437: 1429: 1427: 1425:Galilean moons 1421: 1420: 1418: 1417: 1412: 1407: 1402: 1396: 1394: 1390: 1389: 1384: 1381: 1380: 1373: 1372: 1365: 1358: 1350: 1333: 1319: 1312: 1300: 1287: 1286: 1285: 1284: 1273: 1272:External links 1270: 1269: 1268: 1248:(1): 360–371. 1233: 1213:(2): 188–213. 1198: 1174: 1145: 1100: 1079: 1073: 1045: 1008: 955: 954: 939: 927: 912: 900: 885: 870: 855: 828: 797: 778: 765: 752: 750: 747: 744: 743: 730: 729: 727: 724: 699: 696: 641: 638: 617: 614: 612:and Adrastea. 591:and his lover 573:Voyager 1 549:Voyager 2 532:Voyager 2 523: 520: 512:tidally locked 459:Voyager 2 401: 400: 397: 396: 393: 387: 386: 377: 371: 370: 367: 362: 359: 358: 353: 348: 345: 344: 339: 333: 332: 323: 318: 315: 314: 311: 305: 304: 300: 299: 294: 288: 287: 282: 276: 275: 272: 266: 263: 262: 261:(7 h, 9.5 min) 251: 246: 243: 242: 237: 231: 230: 221: 215: 212: 211: 205: 204: 161: 155: 154: 146: 143: 140: 139: 100: 96: 95: 91: 90: 87: 83: 82: 80: 79: 76: 70: 68: 62: 61: 57: 56: 46: 15: 9: 6: 4: 3: 2: 2094: 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306: 301: 298: 295: 293: 289: 283: 281: 277: 273: 270: 269:orbital speed 264: 252: 249: 244: 238: 236: 232: 222: 219: 213: 210: 206: 201: 162: 160: 156: 153: 150: 147: 141: 136: 101: 99:Pronunciation 97: 92: 88: 84: 77: 75: 72: 71: 69: 67: 63: 58: 53: 51: 44: 39: 33: 29: 22: 21:Ananke (moon) 2038: 1946: 1945: 1872:Jupiter LXVI 1843: 1842: 1763:Jupiter LXIX 1705: 1704: 1670:Jupiter LXIV 1586:Ananke group 1556: 1555: 1506: 1505: 1453: 1446: 1439: 1432: 1404: 1385: 1245: 1241: 1210: 1206: 1190:. Retrieved 1186: 1183:IAU Circular 1182: 1166:. Retrieved 1162:the original 1157: 1154:IAU Circular 1153: 1108: 1104: 1087: 1083: 1056: 1016: 1012: 971: 967: 958: 957: 930: 903: 773: 768: 761: 756: 712: 708:Hill spheres 701: 688:tidal forces 673: 666: 658:eccentricity 648:. It orbits 643: 635: 619: 599: 597: 578: 571: 553: 547: 537: 531: 505: 493:Solar System 490: 457: 447: 405: 404: 235:Eccentricity 151: 94:Designations 49: 32: 28:239 Adrastea 1995:S/2003 J 23 1975:Jupiter LIX 1921:Jupiter LVI 1892:S/2003 J 10 1857:Jupiter LXI 1773:S/2003 J 24 1734:Carme group 1724:Jupiter LXX 1680:S/2003 J 12 1635:S/2003 J 16 1620:Jupiter LIV 1615:Jupiter LII 1393:Inner moons 1173:(discovery) 692:Roche limit 662:inclination 391:Temperature 356:synchronous 330:2.0 km 320:Mean radius 280:Inclination 274:31.378 km/s 216:Mean orbit 144:Named after 89:8 July 1979 2056:Categories 1990:Callirrhoe 1931:S/2016 J 4 1926:S/2003 J 4 1887:S/2021 J 5 1882:S/2018 J 3 1867:S/2003 J 9 1862:Jupiter LI 1798:Kallichore 1793:S/2021 J 4 1768:S/2021 J 6 1753:S/2016 J 3 1748:S/2022 J 2 1743:S/2022 J 1 1700:S/2003 J 2 1675:S/2021 J 1 1660:S/2021 J 2 1650:S/2022 J 3 1610:S/2021 J 3 1600:Jupiter LV 1551:S/2018 J 4 1530:S/2011 J 3 1501:S/2018 J 2 1336:Audio help 1327:2021-03-01 1192:2012-03-28 1168:2012-03-28 749:References 581:spacecraft 508:spacecraft 468:spacecraft 449:Jupiter XV 364:Axial tilt 309:Dimensions 163:Adrastean 159:Adjectives 52:spacecraft 1960:Megaclite 1690:Thelxinoe 1665:Praxidike 1640:Harpalyke 881:IAUC 3872 866:IAUC 3454 654:main ring 483:Roman god 476:Greek god 472:Adrasteia 152:Adrasteia 149:Ἀδράστεια 60:Discovery 2040:Category 2009:See also 1948:Pasiphae 1941:Hegemone 1916:Eurydome 1823:Eukelade 1778:Chaldene 1758:Pasithee 1719:Hermippe 1645:Orthosie 1576:Valetudo 1569:Valetudo 1520:Lysithea 1472:Themisto 1465:Themisto 1455:Callisto 1448:Ganymede 1410:Amalthea 1405:Adrastea 1338: · 1133:17733911 1041:10325220 996:15919987 631:porosity 623:Amalthea 585:Adrastea 406:Adrastea 267:Average 228: km 36:Adrastea 1985:Autonoe 1965:Cyllene 1833:Taygete 1803:Erinome 1714:Iocaste 1630:Euanthe 1605:Eupheme 1595:Euporie 1508:Himalia 1325: ( 1296:minutes 1250:Bibcode 1215:Bibcode 1141:6391249 1113:Bibcode 1105:Science 1092:Bibcode 1090:: 883. 1061:Bibcode 1021:Bibcode 1013:Science 976:Bibcode 968:Science 676:Jupiter 667:Due to 650:Jupiter 629:with a 606:JunoCam 579:Galileo 516:Jupiter 506:Galileo 486:Jupiter 297:Jupiter 258: d 50:Galileo 1970:Sinope 1955:Sponde 1877:Kalyke 1813:Eirene 1788:Isonoe 1707:Ananke 1695:Thyone 1655:Helike 1515:Pandia 1441:Europa 1242:Icarus 1207:Icarus 1139:  1131:  1071:  1039:  1004:924257 1002:  994:  593:Ananke 576:. The 375:Albedo 337:Volume 284:0.03° 240:0.0015 218:radius 1980:Aoede 1852:Herse 1845:Carme 1828:Arche 1818:Aitne 1625:Mneme 1558:Carpo 1525:Elara 1415:Thebe 1400:Metis 1137:S2CID 1053:(PDF) 1000:S2CID 726:Notes 684:Metis 640:Orbit 610:Metis 568:Metis 564:Thebe 384:0.045 254:0.298 2000:Kore 1904:(18) 1808:Kale 1736:(30) 1588:(26) 1496:Ersa 1491:Leda 1187:3872 1158:3454 1129:PMID 1069:ISBN 1037:PMID 992:PMID 601:Juno 589:Zeus 566:and 542:and 479:Zeus 380:0.10 369:zero 1535:Dia 1484:(9) 1280:by 1258:doi 1246:135 1223:doi 1211:138 1121:doi 1109:206 1029:doi 1017:284 984:doi 972:308 678:'s 627:ice 546:in 514:to 326:8.2 226:000 224:129 2058:: 1434:Io 1256:. 1244:. 1240:. 1221:. 1209:. 1205:. 1185:. 1181:. 1156:. 1152:. 1135:. 1127:. 1119:. 1107:. 1088:34 1086:. 1067:. 1035:. 1027:. 1015:. 998:. 990:. 982:. 970:. 942:^ 915:^ 888:^ 873:^ 858:^ 831:^ 800:^ 781:^ 734:^ 710:. 595:. 518:. 488:. 436:iː 256:26 191:iː 129:iː 1369:e 1362:t 1355:v 1342:) 1334:( 1329:) 1298:) 1294:7 1291:( 1266:. 1260:: 1252:: 1231:. 1225:: 1217:: 1195:. 1171:. 1143:. 1123:: 1115:: 1098:. 1094:: 1077:. 1063:: 1043:. 1031:: 1023:: 1006:. 986:: 978:: 952:. 937:. 925:. 898:. 883:. 868:. 853:. 826:. 795:. 562:( 442:/ 439:ə 433:t 430:s 427:ˈ 424:ə 421:r 418:d 415:æ 412:/ 408:( 382:± 328:± 200:/ 197:n 194:ə 188:t 185:s 182:ˈ 179:ə 176:r 173:d 170:æ 167:/ 135:/ 132:ə 126:t 123:s 120:ˈ 117:ə 114:r 111:d 108:æ 105:/ 30:. 23:.

Index

Ananke (moon)
239 Adrastea

Galileo spacecraft
Discovered by
David C. Jewitt
/ædrəˈstə/
Ἀδράστεια
Adjectives
/ædrəˈstən/
Orbital characteristics
radius
Eccentricity
Orbital period (sidereal)
orbital speed
Inclination
Satellite of
Jupiter
Dimensions
Mean radius
Volume
Synodic rotation period
synchronous
Axial tilt
Albedo
Temperature
/ædrəˈstə/
inner moons of Jupiter
Voyager 2
natural satellite

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