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Weywot

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from the ring, the 6:1 Weywot mean-motion resonance is thought to help prevent the ring from accreting into a solid body. It is unknown which of these two resonances plays a more dominant role in maintaining the ring, as the underlying parameters necessary to calculate their effects are poorly known. The ring is likely coplanar with Weywot's orbit within a relative inclination of
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with Weywot that lies slightly interior to the ring at 4,021 km (2,499 mi). This near-coincidence suggests Weywot could play a role in perturbing the ring by producing irregularities in the ring's width and density. Together with Quaoar's 1:3 spin-orbit resonance that lies slightly farther
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of about 0.04, considerably darker than Quaoar's albedo of 0.12. Weywot was previously thought to have a diameter of 81 ± 11 km (50 ± 7 mi), about half that of the occultation measurement, because researchers based this estimate only on Weywot's relative brightness and
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As of 2023, Weywot is thought to be about 200 km (120 mi) in diameter, based on multiple observations of a stellar occultation by Weywot on 22 June 2023. Occultations by Weywot have been observed previously on 4 August 2019, 11 June 2022, and 26 May 2023, which all gave similar diameter
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wavelengths. The apparent magnitude of Weywot by itself is the sum of this magnitude difference and Quaoar's apparent magnitude of 19.0. Likewise, the absolute magnitude of Weywot is the sum of this magnitude difference and Quaoar's absolute magnitude of
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change in its projected orbital plane. That is, it could not be recognized whether Weywot orbited prograde or retrograde with respect to the ecliptic. The discontinuity of known observations of Weywot at the time also resulted in a 0.39-day
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billions of years ago. The moon is nearly 200 km (120 mi) in diameter and it orbits Quaoar every 12.4 days at an average distance of 13,300 km (8,300 mi). Weywot is thought to play a role in maintaining Quaoar's outer
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To determine Weywot's orbit, Brown reobserved Weywot with Hubble in March 2007 and March 2008. Together with his colleague Wesley Fraser, Brown published the first preliminary orbit of Weywot in May 2010. Fraser and Brown were unable to
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in its orbital period, which allowed for even more possible orbit solutions with different orbital periods. These issues were eventually resolved when astronomers obtained a precise measurement of Weywot's position from a
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by other massive bodies. Of these scenarios, Weywot most likely formed as a fragment of Quaoar that was ejected into an initially eccentric orbit by a major impact event billions of years ago. Weywot's orbit must have
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Weywot orbits Quaoar at an average distance of 13,300 km (8,300 mi) and takes 12.4 days to complete one revolution. Its orbit is likely coplanar with Quaoar's equator, while the entire Quaoar system is
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Fraser, Wesley C.; Batygin, Konstantin; Brown, Michael E.; Bouchez, Antonin (January 2013). "The mass, orbit, and tidal evolution of the Quaoar-Weywot system".
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estimates of about 170 km (110 mi). Given Weywot's magnitude difference from Quaoar, this occultation-derived diameter suggests Weywot has low
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C. L. Pereira; B. Sicardy; B. E. Morgado; F. Braga-Ribas; E. Fernández-Valenzuela; D. Souami; et al. (2023). "The two rings of (50000) Quaoar".
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for Weywot were complicated by the issue of mirror ambiguity, where two possible inclinations could equally fit Weywot's orbit due to the lack of
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very slowly for it to remain eccentric today, which would mean its orbit has changed very little since it had formed. The trans-Neptunian
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Hubble images of Quaoar from 2002, either because the satellite was obscured by Quaoar or it was too faint in ultraviolet light.
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Fernandez-Valenzuela, E.; Holler, B.; Ortiz, J. L.; Vachier, F.; Braga-Ribas, F.; Rommel, F.; et al. (October 2023).
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of 0.14, which challenges theoretical expectations that Weywot could have formed out of a disk of material in
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on 4 August 2019, which allowed researchers to unambiguously settle on a prograde 12.4-day orbit for Weywot.
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Fornasier, S.; Lellouch, E.; Müller, T.; Santos-Sanz, P.; Panuzzo, P.; Kiss, C.; et al. (July 2013).
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to Quaoar, Weywot's high eccentricity may subject it to a spin-orbit resonance similar to the planet
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orbiting Quaoar at a distance of 4,148 km (2,577 mi), which nearly coincides with the 6:1
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with other bodies, an origin as a collisionally-ejected fragment of Quaoar, gravitational
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Arakawa, Sota; Hyodo, Ryuki; Shoji, Daigo; Genda, Hidenori (December 2021).
1441: 1105: 729:. For these reasons, most of Weywot's physical properties such as its mass, 512: 500: 1882: 1064:"A dense ring of the trans-Neptunian object Quaoar outside its Roche limit" 648:, and it is inferred to have formed and evolved in the same way as Weywot. 1690: 661: 656: 598: 277: 439:, Weywot is thought to be a fragment of Quaoar that was ejected into an 46: 1518: 432: 420: 353: 1595: 543:, son of Quaoar. The name of Weywot was officially announced by the 1476: 1408: 677:
In February 2023, astronomers announced the discovery of a distant
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Weywot: the darkest known satellite in the trans-Neptunian region
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around Quaoar. Instead of having a synchronous rotation
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This article is about the moon. For the Tongva god, see
1062:; H. Salo; F. Vachier; et al. (8 February 2023). 820:(8812). Central Bureau for Astronomical Telegrams: 1. 127: 121: 133: 374: 362: 352: 337: 332: 320: 302: 284: 263: 235: 209: 175: 156: 144: 118: 109: 99: 94: 86: 65: 60: 1230:Fraser, Wesley C.; Brown, Michael E. (May 2010). 920:(67220). Minor Planet Center: 134. 4 October 2009 51:Quaoar and Weywot (left of Quaoar) imaged by the 1453: 1451: 1391: 1389: 1639: 1364:"Heavenly Bodies and the People of the Earth" 1225: 1223: 1221: 1219: 1217: 1149: 1147: 1145: 1143: 1053: 1051: 1049: 1047: 1045: 1043: 1041: 1039: 985: 983: 427:and Terry-Ann Suer using images taken by the 8: 1335:. Space Telescope Science Institute: 11169. 1300:. Space Telescope Science Institute: 10860. 1194:. Space Telescope Science Institute: 10545. 981: 979: 977: 975: 973: 971: 969: 967: 965: 963: 644:hosts a similarly eccentric satellite named 535:. Brown left the choice of a name up to the 39: 1181: 1179: 1177: 1058:B. E. Morgado; B. Sicardy; F. Braga-Ribas; 746:assumed it had a similar albedo as Quaoar. 1803: 1798: 1671: 1666: 1646: 1632: 1624: 1188:"Icy planetoids of the outer solar system" 905: 903: 854:Johnston, Wm. Robert (21 September 2014). 849: 847: 807: 805: 803: 801: 799: 797: 761: 759: 558:Orbit diagrams of the Quaoar–Weywot system 45: 1612: 1594: 1493: 1475: 1407: 1268: 1250: 1003: 937: 935: 547:in a notice published on 4 October 2009. 505:Central Bureau for Astronomical Telegrams 812:Green, Daniel W. E. (22 February 2007). 585:Viewed top-down over Quaoar's north pole 1950:Objects observed by stellar occultation 1945:Astronomical objects discovered in 2006 793: 755: 651:Prior to further observations in 2019, 1562:from the original on 12 February 2023. 1370:. Heldref Publications. Archived from 38: 1333:Mikulski Archive for Space Telescopes 1298:Mikulski Archive for Space Telescopes 1192:Mikulski Archive for Space Telescopes 1156:"Quaoar and Weywot (50000 2002 LM60)" 431:on 14 February 2006. Named after the 287:Longitude of ascending node 7: 1232:"Quaoar: A Rock in the Kuiper Belt" 527:Upon discovery, Weywot was given a 443:around the dwarf planet by a major 860:Asteroids with Satellites Database 25: 1526:Journal for Occultation Astronomy 1519:"Beyond Jupiter – (50000) Quaoar" 1294:"The largest Kuiper belt objects" 832:from the original on 19 July 2011 702:Weywot is extremely dim, with an 597:by about 16° with respect to the 578: 564: 114: 1940:Discoveries by Michael E. Brown 1329:"Collisions in the Kuiper belt" 468:Weywot was first imaged by the 1517:Kretlow, Mike (January 2020). 1154:Grundy, Will (21 March 2022). 1: 683:mean-motion orbital resonance 1399:Astronomy & Astrophysics 1362:Street, Nick (August 2008). 1327:Brown, Michael (July 2007). 1292:Brown, Michael (July 2006). 1270:10.1088/0004-637X/714/2/1547 1186:Brown, Michael (July 2005). 1022:10.1016/j.icarus.2012.11.004 472:on 14 February 2006, during 1614:10.1051/0004-6361/201321329 1556:www.asteroidoccultation.com 1426:10.1051/0004-6361/202346365 856:"(50000) Quaoar and Weywot" 493:Advanced Camera for Surveys 454:gravitationally influencing 27:Moon of dwarf planet Quaoar 1966: 1935:Trans-Neptunian satellites 1583:Astronomy and Astrophysics 1090:10.1038/S41586-022-05629-6 305:Argument of periapsis 29: 1801: 1797: 1669: 1665: 1239:The Astrophysical Journal 947:Jet Propulsion Laboratory 737:have yet to be measured. 389: 238:Orbital period (sidereal) 163: 44: 1495:10.3847/1538-3881/ac1f91 1464:The Astronomical Journal 698:Physical characteristics 377:Absolute magnitude  333:Physical characteristics 1605:2013A&A...555A..15F 1418:2023A&A...673L...4P 776:fainter than Quaoar in 717:fainter than Quaoar in 529:provisional designation 482:trans-Neptunian objects 423:. It was discovered by 404:provisional designation 158:Orbital characteristics 918:Minor Planet Circulars 723:Hubble Space Telescope 470:Hubble Space Telescope 429:Hubble Space Telescope 53:Hubble Space Telescope 1659:likely dwarf planets 1162:. Lowell Observatory 862:. Johnston's Archive 653:orbit determinations 606:orbital eccentricity 398:(formal designation 1538:2020JOA....10a..24K 1486:2021AJ....162..226A 1341:2007hst..prop11169B 1306:2006hst..prop10860B 1261:2010ApJ...714.1547F 1200:2005hst..prop10545B 1082:2023Natur.614..239M 1014:2013Icar..222..357F 826:2007IAUC.8812....1B 667:stellar occultation 545:Minor Planet Center 435:sky god and son of 87:Discovery date 41: 704:apparent magnitude 604:Weywot has a high 515:Weywot in earlier 491:s high-resolution 365:Apparent magnitude 67:Discovered by 32:Weywot (mythology) 1917: 1916: 1913: 1912: 1908: 1907: 1793: 1792: 1788: 1787: 1769:S/2015 (136472) 1 1076:(7947): 239–243. 881:Suer, Terry-Ann. 706:of 24.7—that is, 571:Viewed from Earth 458:orbital resonance 411:natural satellite 393: 392: 322:Satellite of 147:Alternative names 16:(Redirected from 1957: 1899: 1836: 1834: 1833: 1804: 1799: 1672: 1667: 1648: 1641: 1634: 1625: 1619: 1618: 1616: 1598: 1570: 1564: 1563: 1548: 1542: 1541: 1523: 1514: 1508: 1507: 1497: 1479: 1455: 1446: 1445: 1411: 1393: 1384: 1383: 1381: 1379: 1359: 1353: 1352: 1350: 1348: 1324: 1318: 1317: 1315: 1313: 1289: 1283: 1282: 1272: 1254: 1245:(2): 1547–1550. 1236: 1227: 1212: 1211: 1209: 1207: 1183: 1172: 1171: 1169: 1167: 1151: 1138: 1137: 1127: 1110: 1109: 1055: 1034: 1033: 1007: 987: 958: 957: 955: 953: 939: 930: 929: 927: 925: 915: 911:"M. P. C. 67220" 907: 898: 897: 895: 893: 887:sites.google.com 878: 872: 871: 869: 867: 851: 842: 841: 839: 837: 809: 782: 772: 770: 763: 743:geometric albedo 713: 711: 693: 691: 582: 568: 534: 533:S/2006 (50000) 1 497:angular distance 490: 407:S/2006 (50000) 1 400:(50000) Quaoar I 348: 316: 314: 298: 296: 275: 273: 258: 256: 249: 247: 230: 228: 221: 219: 204: 202: 199: 192: 190: 187: 152:S/2006 (50000) 1 140: 139: 136: 135: 132: 129: 126: 123: 120: 105:(50000) Quaoar I 90:14 February 2006 75:Michael E. Brown 49: 42: 21: 1965: 1964: 1960: 1959: 1958: 1956: 1955: 1954: 1920: 1919: 1918: 1909: 1904: 1898: 1894: 1887: 1876: 1865: 1854: 1831: 1830: 1827: 1789: 1784: 1773: 1762: 1751: 1730: 1661: 1652: 1622: 1572: 1571: 1567: 1550: 1549: 1545: 1521: 1516: 1515: 1511: 1457: 1456: 1449: 1395: 1394: 1387: 1377: 1375: 1368:Search Magazine 1361: 1360: 1356: 1346: 1344: 1326: 1325: 1321: 1311: 1309: 1291: 1290: 1286: 1234: 1229: 1228: 1215: 1205: 1203: 1185: 1184: 1175: 1165: 1163: 1160:www2.lowell.edu 1153: 1152: 1141: 1129: 1128: 1113: 1057: 1056: 1037: 989: 988: 961: 951: 949: 941: 940: 933: 923: 921: 913: 909: 908: 901: 891: 889: 880: 879: 875: 865: 863: 853: 852: 845: 835: 833: 811: 810: 795: 791: 786: 785: 768: 766: 764: 757: 752: 727:Keck Telescopes 709: 707: 700: 689: 687: 675: 642:225088 Gonggong 635:tidally evolved 590: 589: 588: 587: 586: 583: 574: 573: 572: 569: 560: 559: 553: 532: 525: 488: 466: 441:eccentric orbit 415:trans-Neptunian 413:or moon of the 382: 367: 346: 342: 312: 310: 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614:tidally locked 610:circular orbit 584: 577: 576: 575: 570: 563: 562: 561: 557: 556: 555: 554: 552: 549: 524: 521: 476:'s survey for 465: 462: 391: 390: 387: 386: 383: 375: 372: 371: 368: 363: 360: 359: 356: 350: 349: 343: 338: 335: 334: 330: 329: 324: 318: 317: 308: 303: 300: 299: 290: 285: 282: 281: 267: 261: 260: 241: 236: 233: 232: 213: 207: 206: 181: 176: 173: 172: 161: 160: 154: 153: 150: 145: 142: 141: 111: 107: 106: 103: 100: 97: 96: 92: 91: 88: 84: 83: 81: 80: 79:Terry-Ann Suer 77: 71: 69: 63: 62: 58: 57: 50: 26: 24: 14: 13: 10: 9: 6: 4: 3: 2: 1962: 1951: 1948: 1946: 1943: 1941: 1938: 1936: 1933: 1931: 1928: 1927: 1925: 1901: 1892: 1891: 1889: 1884: 1881: 1880: 1878: 1873: 1870: 1869: 1867: 1862: 1859: 1858: 1856: 1851: 1848: 1846: 1843: 1842: 1840: 1839: 1835: 1826: 1824: 1821: 1819: 1816: 1814: 1811: 1809: 1806: 1805: 1800: 1796: 1781: 1778: 1777: 1775: 1770: 1767: 1766: 1764: 1759: 1756: 1755: 1753: 1748: 1745: 1743: 1740: 1738: 1735: 1734: 1732: 1727: 1724: 1722: 1719: 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242: 239: 234: 214: 212: 208: 182: 179: 174: 170: 166: 162: 159: 155: 151: 148: 143: 138: 112: 110:Pronunciation 108: 104: 98: 93: 89: 85: 78: 76: 73: 72: 70: 68: 64: 59: 54: 48: 43: 37: 33: 19: 18:Weywot (moon) 1930:50000 Quaoar 1849: 1586: 1582: 1576: 1568: 1555: 1546: 1529: 1525: 1512: 1467: 1463: 1397: 1376:. Retrieved 1372:the original 1367: 1357: 1345:. Retrieved 1332: 1322: 1310:. Retrieved 1297: 1287: 1242: 1238: 1204:. Retrieved 1191: 1164:. Retrieved 1159: 1132: 1073: 1067: 995: 991: 950:. Retrieved 922:. Retrieved 917: 890:. Retrieved 886: 876: 864:. Retrieved 859: 834:. Retrieved 818:IAU Circular 817: 739: 701: 676: 650: 639:dwarf planet 603: 591: 526: 509: 485: 467: 445:impact event 418:dwarf planet 406: 399: 395: 394: 378: 327:50000 Quaoar 259: (2013) 250: (2023) 231: (2013) 222: (2023) 211:Eccentricity 205: (2013) 193: (2023) 95:Designations 36: 1596:1305.0449v2 1206:11 February 1166:11 February 1060:J. L. Ortiz 952:11 February 924:12 February 892:11 February 735:light curve 657:parallactic 517:ultraviolet 347:200 km 265:Inclination 191:189 km 171:2454549.42) 101:Designation 1924:Categories 1477:2108.08553 1442:Q117802048 1409:2304.09237 1343:. Cycle 16 1308:. Cycle 15 1202:. Cycle 14 1106:Q116754015 789:References 774:magnitudes 765:Weywot is 715:magnitudes 630:resonances 622:collisions 501:arcseconds 478:satellites 1504:237213381 1470:(6): 29. 1434:0004-6361 1378:8 January 1252:1003.5911 1098:1476-4687 1005:1211.1016 464:Discovery 456:it in an 61:Discovery 1780:Xiangliu 1758:Dysnomia 1721:Kerberos 1696:Gonggong 1691:Makemake 1560:Archived 1438:Wikidata 1347:27 April 1312:27 April 1279:17386407 1102:Wikidata 1030:17196395 830:Archived 725:and the 646:Xiangliu 599:ecliptic 595:inclined 513:precover 499:of 0.35 278:ecliptic 1895:2013 FY 1829:2013 FY 1818:Salacia 1747:Hiʻiaka 1601:Bibcode 1534:Bibcode 1482:Bibcode 1414:Bibcode 1337:Bibcode 1302:Bibcode 1257:Bibcode 1196:Bibcode 1078:Bibcode 1010:Bibcode 822:Bibcode 778:visible 618:Mercury 601:plane. 409:) is a 253:12.4314 244:12.4311 55:in 2006 1883:Ilmarë 1872:Actaea 1850:Weywot 1808:Quaoar 1742:Namaka 1706:Charon 1681:Haumea 1589:: 22. 1506:. 226. 1502:  1440:  1432:  1277:  1104:  1096:  1069:Nature 1028:  992:Icarus 866:26 May 836:5 July 733:, and 541:Weywot 537:Tongva 486:Hubble 437:Quaoar 433:Tongva 421:Quaoar 396:Weywot 358:≈ 0.04 354:Albedo 40:Weywot 1861:Vanth 1845:rings 1823:Varda 1813:Orcus 1726:Hydra 1676:Pluto 1655:Moons 1591:arXiv 1522:(PDF) 1500:S2CID 1472:arXiv 1404:arXiv 1275:S2CID 1247:arXiv 1235:(PDF) 1026:S2CID 1000:arXiv 914:(PDF) 781:2.74. 750:Notes 731:color 662:alias 628:, or 551:Orbit 489:' 385:≈ 8.3 270:15.8° 229:0.006 225:0.137 220:0.093 216:0.056 165:Epoch 1737:ring 1711:Styx 1686:Eris 1430:ISSN 1380:2020 1349:2023 1314:2023 1208:2023 1168:2023 1094:ISSN 954:2023 926:2023 894:2023 868:2009 838:2011 679:ring 523:Name 450:ring 370:24.7 315:0.7° 311:335° 297:0.7° 293:1.0° 276:(to 274:0.7° 1716:Nix 1657:of 1609:doi 1587:555 1490:doi 1468:162 1422:doi 1265:doi 1243:714 1086:doi 1074:614 1018:doi 996:222 771:0.2 767:5.6 712:0.2 708:5.6 452:by 379:(H) 203:200 198:900 186:289 1926:: 1897:27 1832:27 1607:. 1599:. 1585:. 1581:. 1579:m" 1554:. 1530:10 1528:. 1524:. 1498:. 1488:. 1480:. 1466:. 1462:. 1450:^ 1436:. 1428:. 1420:. 1412:. 1402:. 1388:^ 1366:. 1331:. 1296:. 1273:. 1263:. 1255:. 1241:. 1237:. 1216:^ 1190:. 1176:^ 1158:. 1142:^ 1114:^ 1100:. 1092:. 1084:. 1072:. 1066:. 1038:^ 1024:. 1016:. 1008:. 994:. 962:^ 945:. 934:^ 916:. 902:^ 885:. 858:. 846:^ 828:. 816:. 796:^ 758:^ 694:. 692:7° 688:5° 531:, 460:. 402:; 345:≈ 196:13 184:13 169:JD 125:eɪ 1900:I 1647:e 1640:t 1633:v 1617:. 1611:: 1603:: 1593:: 1577:µ 1540:. 1536:: 1492:: 1484:: 1474:: 1444:. 1424:: 1416:: 1406:: 1382:. 1351:. 1339:: 1316:. 1304:: 1281:. 1267:: 1259:: 1249:: 1210:. 1198:: 1170:. 1108:. 1088:: 1080:: 1032:. 1020:: 1012:: 1002:: 956:. 928:. 896:. 870:. 840:. 824:: 769:± 710:± 690:± 313:± 295:± 280:) 272:± 255:± 246:± 227:± 218:± 201:± 189:± 137:/ 134:t 131:ɒ 128:w 122:w 119:ˈ 116:/ 34:. 20:)

Index

Weywot (moon)
Weywot (mythology)

Hubble Space Telescope
Discovered by
Michael E. Brown
/ˈwwɒt/
Alternative names
Orbital characteristics
Epoch
JD
Semi-major axis
Eccentricity
Orbital period (sidereal)
Inclination
ecliptic
Longitude of ascending node
Argument of periapsis
Satellite of
50000 Quaoar
Mean diameter
Albedo
Apparent magnitude
Absolute magnitude (H)
provisional designation
natural satellite
trans-Neptunian
dwarf planet
Quaoar
Michael Brown

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