Knowledge (XXG)

2013 TX68

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which makes long-term predictions of its position less certain. It was observed for three days as it approached Earth in the night sky starting with the sixth of October, 2013. Then it became unobservable by being between the Earth and the Sun, then not recovered due to its small size and dimness.
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because it is less than 100 meters (330 ft) in diameter. With an insignificant 1-day observation arc, it was listed on the Sentry Risk Table with a 1 in 20 million chance it could impact Earth on 5 March 2016, but that threat was quickly ruled out. With a short 3-day observation arc, it was
431:) from the Earth on March 8, it was calculated to pass as close as 0.0002 AU (30,000 km; 19,000 mi) (0.07 LD) or as far away as 0.1 AU (15,000,000 km; 9,300,000 mi). There was no risk of an Earth impact in 2016. JPL's graphic representation of 730: 438:'s orbit showed it was approaching Earth from the sunward side for an approach near the eighth of March with a chance of being detected by telescopes as it flew by. It was not expected to be more than 100 degrees from the Sun until March 9 and was expected to have an 414:
The asteroid has a poorly constrained orbit, has not been observed since 2013, and often makes approaches to Earth. One such approach occurred sometime from 6 to 10 March 2016 with an uncertainty in the time of closest approach of ±2 days. While the nominal
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If it were ever to impact Earth, it would likely create a large fireball in the sky and possibly an impact crater 100–575 meters (328–1,886 ft) across, assuming an impact angle of less than 45 degrees.
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of roughly 20.3. The asteroid was not recovered during the 2016 approach. During the March 2016 passage the uncertainty region for the asteroid covered as much as a 45 degree region of the sky.
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should be around 1.5 AU from Earth on 28 September 2017. It was removed from the Sentry Risk Table on 11 February 2016 when precovery images gave it a 10-day observation arc.
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on 11 February 2016, so there is no risk of impact from this object for the next hundred years or more. The asteroid was last observed on 9 October 2013.
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from 29 September 2013 were announced on 11 February 2016 that extended the observation arc to 10 days. It was removed from the
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listed on the Sentry Risk Table with a 1 in 300 million chance it could impact Earth on 28 September 2017. The nominal (
995: 693: 1870: 1125: 1041: 2034: 2024: 403: 386: 460:. The asteroid is 21–52 meters (69–171 ft) across, making it approximately twice as large as the 2101: 2029: 1108: 596: 1865: 1614: 1523: 1708: 953: 2049: 1933: 1845: 1664: 973: 542: 335: 196: 192: 152: 134: 80: 961: 945: 1970: 1426: 1076: 1069: 1034: 886: 854: 846: 85: 1875: 1688: 910: 902: 894: 878: 870: 862: 837: 254: 114: 1498: 1227: 937: 929: 1943: 1742: 1431: 917: 174: 1748: 1089: 382: 231: 39: 753: 1783: 1683: 1585: 1436: 1102: 517:
The time of closest approach for the 2013 pass is known with an accuracy of better than 1 minute.
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Near-Earth objects removed from the Sentry Risk Table
729:(Near Earth Objects – Dynamic Site). 389:(LD) from the Earth. The asteroid only has a 10-day 2063: 2005: 1942: 1894: 1852: 1722: 1661: 1628: 1508: 1254: 1163: 1145: 1088: 815:(Near Earth Objects – Dynamic Site) 385:, during which it was near a close approach of 5.4 344: 334: 327: 316: 305: 294: 283: 264: 252: 240: 230: 218: 203: 183: 173: 161: 151: 133: 121: 94: 59: 54: 46: 33: 28: 499:List of asteroid close approaches to Earth in 2016 419:) orbit suggested that it would pass 0.03  589:"JPL Small-Body Database Browser: (2013 TX68)" 1830: 1042: 717: 715: 657:Small Asteroid to Pass Close to Earth March 8 8: 809:"2013TX68 Ephemerides for 28 September 2017" 619: 617: 615: 613: 18: 671:. IAU Minor Planet Center. 11 February 2016 1858: 1837: 1823: 1815: 1117:(asteroid sample-return mission; Sep 2016) 1049: 1035: 1027: 783:Wayback Machine: Jet Propulsion Laboratory 723:"2013TX68 Ephemerides for 1–20 March 2016" 652: 650: 629:Wayback Machine: Jet Propulsion Laboratory 583: 581: 2107:Minor planet object articles (unnumbered) 842:NeoDyS-2, Near Earth Objects—Dynamic Site 688: 686: 579: 577: 575: 573: 571: 569: 567: 565: 563: 561: 2127:Astronomical objects discovered in 2013 530: 510: 17: 243:Longitude of ascending node 7: 381:discovered on 6 October 2013 by the 977: 779:"2013 TX68 Impact Risk (1 day arc)" 625:"2013 TX68 Impact Risk (3 day arc)" 340:21-52 meters (69–171 ft) 733:from the original on 13 March 2016 14: 464:. However, it is not listed as a 323:2.66285 AU (398.357 Gm) 157:0.74447 AU (111.371 Gm) 1789: 1788: 1777: 1663: 1258: 1136: 1130: 1124: 1092: 785:. 9 October 2013. Archived from 539:"MPEC 2013-T64 : 2013 TX68" 591:(last observation: 2013-10-09; 169:1.6587 AU (248.14 Gm) 754:"Asteroid 2013 TX68 and Slooh" 466:potentially hazardous asteroid 1: 1105:(X-ray observatory; Feb 2016) 752:Don Yeomans (17 March 2016). 1804:Category:2017 in outer space 1799:Category:2016 in outer space 1794:Category:2015 in outer space 1714:45P/Honda–Mrkos–Pajdušáková 1273:atmospheric composition of 924:space situational awareness 255:Argument of perihelion 2143: 2122:Near-Earth objects in 2016 2117:Near-Earth objects in 2013 1494:2MASS J11193254–1137466 AB 62:Minor planet category 1861: 1846:Small Solar System bodies 1772: 1174:Asteroid close approaches 1122: 1109:ExoMars Trace Gas Orbiter 1062: 597:Jet Propulsion Laboratory 359: 186:Orbital period (sidereal) 113: 101: 1615:WISE J080822.18-644357.3 1111:(Mars orbiter; Mar 2016) 347:Absolute magnitude  329:Physical characteristics 1765:(Mars lander; Oct 2016) 974:JPL Small-Body Database 543:IAU Minor Planet Center 96:Orbital characteristics 81:Venus-crossing asteroid 1971:Trans-Neptunian object 1784:Outer space portal 1427:OGLE-2007-BLG-349(AB)b 855:Observation prediction 473:) solution shows that 86:Mars-crossing asteroid 1689:C/2016 R2 (PANSTARRS) 115:Uncertainty parameter 1944:Distant minor planet 1432:OGLE-2012-BLG-0950Lb 1090:Space probe launches 1752:(end of mission to 1709:43P/Wolf–Harrington 1298:(retracted in 2022) 1020:Physical parameters 954:Physical properties 694:"Date/Time Removed" 383:Catalina Sky Survey 275:10 AU (2.54987 47:Discovery date 40:Catalina Sky Survey 25: 1684:53P/Van Biesbroeck 1437:Proxima Centauri b 1228:469219 KamoĘ»oalewa 887:Observational info 462:Chelyabinsk meteor 456:was listed on the 440:apparent magnitude 35:Discovered by 2089: 2088: 2001: 2000: 1886:Meanings of names 1812: 1811: 1723:Space exploration 789:on 9 October 2013 458:Sentry Risk Table 427:; 2,800,000  404:Sentry Risk Table 379:near-Earth object 363: 362: 226:0° 27 40.86 / day 2134: 2102:Apollo asteroids 1859: 1839: 1832: 1825: 1816: 1792: 1791: 1782: 1781: 1780: 1738:orbit; Jul 2016) 1667: 1611: 1608: 1606: 1605: 1596: 1593: 1591: 1590: 1586:(471325) 2011 KT 1571: 1568: 1566: 1565: 1556: 1533: 1520: 1499:2MASS J2126–8140 1299: 1262: 1247: 1245: 1244: 1240:(164121) 2003 YT 1230: 1223: 1221: 1220: 1211: 1209: 1208: 1199: 1197: 1196: 1187: 1185: 1184: 1140: 1134: 1128: 1096: 1079: 1072: 1051: 1044: 1037: 1028: 1012:Orbital elements 895:Close approaches 825: 824: 822: 820: 805: 799: 798: 796: 794: 775: 769: 768: 766: 764: 749: 743: 742: 740: 738: 719: 710: 709: 707: 705: 690: 681: 680: 678: 676: 665: 659: 654: 645: 644: 642: 640: 631:. Archived from 621: 608: 607: 605: 603: 585: 556: 554: 552: 550: 545:. 7 October 2013 535: 518: 515: 479: 455: 446:Possible impacts 437: 423:(4,500,000  371: 278: 274: 129:(last seen 2013) 109: 2456570.5) 105:5 October 2013 ( 26: 24: 2142: 2141: 2137: 2136: 2135: 2133: 2132: 2131: 2092: 2091: 2090: 2085: 2059: 1997: 1938: 1890: 1848: 1843: 1813: 1808: 1778: 1776: 1768: 1718: 1657: 1624: 1609: 1603: 1602: 1599: 1594: 1588: 1587: 1584: 1575:BOSS Great Wall 1569: 1563: 1562: 1559: 1554: 1542:SDSS J1240+6710 1531: 1518: 1504: 1297: 1250: 1242: 1241: 1238: 1226: 1218: 1217: 1214: 1206: 1205: 1202: 1194: 1193: 1190: 1182: 1181: 1180:(85990) 1999 JV 1178: 1159: 1141: 1135: 1129: 1120: 1084: 1081: 1075: 1073: 1068: 1058: 1055: 911:Orbit animation 879:Proper elements 834: 829: 828: 818: 816: 807: 806: 802: 792: 790: 777: 776: 772: 762: 760: 751: 750: 746: 736: 734: 721: 720: 713: 703: 701: 692: 691: 684: 674: 672: 667: 666: 662: 655: 648: 638: 636: 635:on 3 April 2014 623: 622: 611: 601: 599: 587: 586: 559: 548: 546: 537: 536: 532: 527: 522: 521: 516: 512: 507: 490: 478: 474: 454: 450: 448: 436: 432: 412: 391:observation arc 387:Lunar distances 375:Apollo asteroid 370: 366: 352: 301:0.03407 AU 276: 272: 257: 245: 223: 208: 188: 166: 164:Semi-major axis 128: 123:Observation arc 90: 64: 23: 19: 12: 11: 5: 2140: 2138: 2130: 2129: 2124: 2119: 2114: 2109: 2104: 2094: 2093: 2087: 2086: 2084: 2083: 2078: 2073: 2067: 2065: 2061: 2060: 2058: 2057: 2052: 2047: 2045:Near-parabolic 2042: 2037: 2032: 2027: 2022: 2017: 2011: 2009: 2003: 2002: 1999: 1998: 1996: 1995: 1994: 1993: 1991:Scattered disc 1988: 1983: 1978: 1968: 1963: 1962: 1961: 1959:Neptune trojan 1956: 1948: 1946: 1940: 1939: 1937: 1936: 1934:Spectral types 1931: 1926: 1924:Jupiter trojan 1921: 1916: 1911: 1906: 1900: 1898: 1892: 1891: 1889: 1888: 1883: 1878: 1873: 1868: 1862: 1856: 1850: 1849: 1844: 1842: 1841: 1834: 1827: 1819: 1810: 1809: 1807: 1806: 1786: 1773: 1770: 1769: 1767: 1766: 1757: 1739: 1726: 1724: 1720: 1719: 1717: 1716: 1711: 1706: 1701: 1696: 1691: 1686: 1681: 1679:460P/PanSTARRS 1676: 1670: 1668: 1659: 1658: 1656: 1655: 1650: 1645: 1640: 1634: 1632: 1626: 1625: 1623: 1622: 1617: 1612: 1597: 1582: 1577: 1572: 1557: 1549: 1544: 1539: 1534: 1532:(hypothesized) 1526: 1521: 1512: 1510: 1506: 1505: 1503: 1502: 1496: 1491: 1486: 1481: 1480: 1479: 1474: 1469: 1459: 1454: 1449: 1444: 1439: 1434: 1429: 1424: 1419: 1414: 1409: 1404: 1399: 1394: 1389: 1384: 1379: 1374: 1373: 1372: 1367: 1362: 1357: 1347: 1342: 1337: 1336: 1335: 1330: 1325: 1320: 1315: 1305: 1300: 1292: 1287: 1282: 1277: 1271: 1265: 1263: 1252: 1251: 1249: 1248: 1236: 1231: 1224: 1212: 1200: 1188: 1176: 1170: 1168: 1161: 1160: 1158: 1157: 1151: 1149: 1143: 1142: 1123: 1121: 1119: 1118: 1112: 1106: 1099: 1097: 1086: 1085: 1083: 1082: 1074: 1066: 1063: 1060: 1059: 1056: 1054: 1053: 1046: 1039: 1031: 1025: 1024: 1023: 1022: 980:Close approach 966: 965: 964: 915: 914: 913: 833: 832:External links 830: 827: 826: 800: 770: 744: 711: 700:on 2 June 2002 682: 660: 646: 609: 557: 529: 528: 526: 523: 520: 519: 509: 508: 506: 503: 502: 501: 496: 489: 486: 476: 452: 447: 444: 434: 411: 408: 368: 361: 360: 357: 356: 353: 345: 342: 341: 338: 332: 331: 325: 324: 321: 314: 313: 310: 303: 302: 299: 292: 291: 288: 281: 280: 269: 262: 261: 258: 253: 250: 249: 246: 241: 238: 237: 234: 228: 227: 224: 219: 216: 215: 209: 204: 201: 200: 189: 184: 181: 180: 177: 171: 170: 167: 162: 159: 158: 155: 149: 148: 137: 131: 130: 125: 119: 118: 111: 110: 99: 98: 92: 91: 89: 88: 83: 78: 73: 67: 65: 60: 57: 56: 52: 51: 50:6 October 2013 48: 44: 43: 37: 31: 30: 21: 13: 10: 9: 6: 4: 3: 2: 2139: 2128: 2125: 2123: 2120: 2118: 2115: 2113: 2110: 2108: 2105: 2103: 2100: 2099: 2097: 2082: 2079: 2077: 2074: 2072: 2069: 2068: 2066: 2062: 2056: 2053: 2051: 2048: 2046: 2043: 2041: 2038: 2036: 2033: 2031: 2028: 2026: 2023: 2021: 2018: 2016: 2013: 2012: 2010: 2008: 2004: 1992: 1989: 1987: 1984: 1982: 1979: 1977: 1974: 1973: 1972: 1969: 1967: 1964: 1960: 1957: 1955: 1952: 1951: 1950: 1949: 1947: 1945: 1941: 1935: 1932: 1930: 1927: 1925: 1922: 1920: 1917: 1915: 1914:Asteroid belt 1912: 1910: 1909:Aten asteroid 1907: 1905: 1902: 1901: 1899: 1897: 1893: 1887: 1884: 1882: 1879: 1877: 1874: 1872: 1869: 1867: 1864: 1863: 1860: 1857: 1855: 1854:Minor planets 1851: 1847: 1840: 1835: 1833: 1828: 1826: 1821: 1820: 1817: 1805: 1801: 1800: 1795: 1787: 1785: 1775: 1774: 1771: 1764: 1762: 1758: 1755: 1751: 1750: 1745: 1744: 1740: 1737: 1733: 1732: 1728: 1727: 1725: 1721: 1715: 1712: 1710: 1707: 1705: 1702: 1700: 1697: 1695: 1692: 1690: 1687: 1685: 1682: 1680: 1677: 1675: 1672: 1671: 1669: 1666: 1660: 1654: 1651: 1649: 1646: 1644: 1641: 1639: 1636: 1635: 1633: 1631: 1627: 1621: 1618: 1616: 1613: 1607: 1598: 1592: 1583: 1581: 1578: 1576: 1573: 1567: 1558: 1553: 1550: 1548: 1545: 1543: 1540: 1538: 1535: 1530: 1527: 1525: 1522: 1517: 1514: 1513: 1511: 1507: 1500: 1497: 1495: 1492: 1490: 1487: 1485: 1482: 1478: 1475: 1473: 1470: 1468: 1465: 1464: 1463: 1460: 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935: 931: 928: 927: 926: 925: 919: 916: 912: 908: 904: 903:Physical info 900: 896: 892: 888: 884: 880: 876: 872: 868: 864: 860: 856: 852: 848: 845: 844: 843: 839: 836: 835: 831: 814: 810: 804: 801: 788: 784: 780: 774: 771: 759: 755: 748: 745: 732: 728: 724: 718: 716: 712: 699: 695: 689: 687: 683: 670: 664: 661: 658: 653: 651: 647: 634: 630: 626: 620: 618: 616: 614: 610: 598: 594: 590: 584: 582: 580: 578: 576: 574: 572: 570: 568: 566: 564: 562: 558: 544: 540: 534: 531: 524: 514: 511: 504: 500: 497: 495: 492: 491: 487: 485: 481: 472: 467: 463: 459: 445: 443: 441: 430: 426: 422: 418: 410:2016 approach 409: 407: 405: 401: 397: 392: 388: 384: 380: 376: 372: 358: 354: 351: 350: 343: 339: 337: 333: 330: 326: 322: 320: 317:Jupiter  315: 311: 309: 304: 300: 298: 293: 289: 287: 284:Mercury  282: 270: 268: 263: 259: 256: 251: 247: 244: 239: 235: 233: 229: 225: 222: 217: 214: 210: 207: 202: 198: 195:(780.31  194: 190: 187: 182: 178: 176: 172: 168: 165: 160: 156: 154: 150: 146: 143:(384.92  142: 138: 136: 132: 126: 124: 120: 116: 112: 108: 104: 100: 97: 93: 87: 84: 82: 79: 77: 74: 72: 69: 68: 66: 63: 58: 53: 49: 45: 41: 38: 36: 32: 27: 16: 2081:Space debris 1797: 1761:Schiaparelli 1760: 1747: 1741: 1729: 1704:144P/Kushida 1489:V830 Tauri b 1422:Kepler-1647b 1417:Kepler-1638b 1412:Kepler-1625b 1407:Kepler-1520b 1402:Kepler-1229b 1295:HD 131399 Ab 1285:Gliese 536 b 1203: 1015: 1007: 999: 991: 983: 972: 957: 949: 941: 938:Observations 933: 921: 906: 898: 890: 882: 874: 866: 863:Orbital info 858: 850: 841: 817:. Retrieved 803: 791:. Retrieved 787:the original 782: 773: 761:. Retrieved 758:Asteroid Day 747: 735:. Retrieved 702:. Retrieved 698:the original 673:. Retrieved 663: 637:. Retrieved 633:the original 628: 600:. Retrieved 595:: 10 days). 547:. Retrieved 533: 513: 482: 449: 413: 365: 364: 348: 206:Mean anomaly 175:Eccentricity 139:2.5730  55:Designations 15: 2071:Cosmic dust 2035:Long-period 2025:Halley-type 1981:Kuiper belt 1866:Designation 1756:; Sep 2016) 1674:252P/LINEAR 1653:ASASSN-16ma 1648:ASASSN-16kt 1638:ASASSN-15lh 1610:(announced) 1595:(announced) 1580:GRB 160625B 1570:(announced) 1555:(announced) 1529:Planet Nine 1519:(announced) 1509:Discoveries 1484:TW Hydrae b 1397:Kepler-737b 1303:HD 164922 c 1275:55 Cancri e 1155:DN160822 03 930:Ephemerides 847:Ephemerides 793:13 February 704:12 February 675:12 February 549:12 February 295:Venus  279:10 km) 265:Earth  232:Inclination 221:Mean motion 2096:Categories 2076:Meteoroids 2055:Sungrazing 2030:Hyperbolic 1986:Oort cloud 1929:Near-Earth 1643:SN 2016aps 1462:TRAPPIST-1 1392:Kepler-56d 1387:Kepler-20g 1290:HD 19467 b 1280:BD+20 594b 1256:Exoplanets 1115:OSIRIS-REx 819:6 February 525:References 400:Pan-STARRS 398:images by 336:Dimensions 306:Mars  191:2.14  153:Perihelion 1966:Damocloid 1754:comet 67P 1734:(entered 1699:9P/Tempel 1524:IDCS 1426 1501:as planet 1308:HIP 41378 1164:Selected 996:Ephemeris 988:Discovery 969:2013 TX68 918:2013 TX68 838:2013 TX68 639:1 January 555:(K13T68X) 396:Precovery 29:Discovery 2050:Periodic 1976:Detached 1896:Asteroid 1694:81P/Wild 1552:GW151226 1547:Crater 2 1516:GW150914 1457:Qatar-5b 1452:Qatar-4b 1447:Qatar-3b 1442:Pr0211 c 1382:KELT-11b 1345:K2-332 b 1080: Â» 763:21 March 731:Archived 488:See also 471:best-fit 417:best-fit 260:286.977° 248:165.741° 135:Aphelion 2015:Extinct 1954:Centaur 1743:Rosetta 1736:Jupiter 1662:Comets 1620:Virgo I 1601:2014 UZ 1561:2015 RR 1377:KELT-9b 1234:2016 PQ 1216:2016 EU 1204:2013 TX 1192:1994 WR 1067:«  971:at the 962:Summary 737:8 March 602:4 April 494:2009 RR 475:2013 TX 451:2013 TX 433:2013 TX 367:2013 TX 312:0.00715 290:0.43841 271:1.70448 236:1.1092° 179:0.55118 127:10 days 20:2013 TX 2007:Comets 1919:Family 1904:Active 1871:Groups 1749:Philae 1537:GN-z11 1340:K2-33b 1103:Hitomi 1016:· 1014:  1008:· 1006:  1000:· 998:  992:· 990:  984:· 982:  958:· 956:  950:· 948:  942:· 940:  934:· 932:  907:· 905:  899:· 897:  891:· 889:  883:· 881:  875:· 873:  867:· 865:  859:· 857:  851:· 849:  813:NEODyS 727:NEODyS 373:is an 211:334.34 76:Apollo 2064:Other 2020:Great 1630:Novae 1350:K2-72 1018: 1010: 1002: 994: 986: 960: 952: 946:Orbit 944: 936: 909: 901: 893: 885: 877: 869: 861: 853: 505:Notes 103:Epoch 42:(703) 2040:Lost 1881:Moon 1876:List 1731:Juno 1166:NEOs 1077:2017 1070:2015 922:ESA– 871:MOID 821:2016 795:2016 765:2016 739:2016 706:2016 677:2016 641:2016 604:2016 551:2016 377:and 355:25.2 319:MOID 308:MOID 297:MOID 286:MOID 267:MOID 1763:EDM 1604:224 1564:245 920:at 840:at 593:arc 349:(H) 71:NEO 2098:: 1802:— 1796:— 1746:/ 1589:19 1219:85 1207:68 1195:12 811:. 781:. 756:. 725:. 714:^ 685:^ 649:^ 627:. 612:^ 560:^ 541:. 477:68 453:68 435:68 429:mi 425:km 421:AU 369:68 193:yr 145:Gm 141:AU 107:JD 22:68 1838:e 1831:t 1824:v 1477:d 1472:c 1467:b 1370:e 1365:d 1360:c 1355:b 1333:f 1328:e 1323:d 1318:c 1313:b 1243:1 1183:6 1050:e 1043:t 1036:v 823:. 797:. 767:. 741:. 708:. 679:. 643:. 606:. 553:. 415:( 277:Ă— 273:Ă— 213:° 199:) 197:d 147:) 117:8

Index

Discovered by
Catalina Sky Survey
Minor planet category
NEO
Apollo
Venus-crossing asteroid
Mars-crossing asteroid
Orbital characteristics
Epoch
JD
Uncertainty parameter
Observation arc
Aphelion
AU
Gm
Perihelion
Semi-major axis
Eccentricity
Orbital period (sidereal)
yr
d
Mean anomaly
°
Mean motion
Inclination
Longitude of ascending node
Argument of perihelion
MOID
MOID
MOID

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