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163693 Atira

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1531: 217: 937: 653:, a new subclass of near-Earth asteroids, which have their orbits entirely within that of Earth and are therefore alternatively called Interior-Earth Objects (IEO). As of 2019, there are only 36 known members of the Atira group of asteroids. Atiras are similar to the larger group of 764:
is one of the largest Near-Earth objects. Early estimates of its size ranged from 1 to 2 kilometers, but those were based on an assumed higher albedo of 0.20. Its larger size and low albedo were discovered when
724: – as Venus orbits the Sun at a distance of 0.72–0.73 AU – but does not get as close to the Sun as Mercury (which orbits between 0.31 and 0.47 AU). As no 833:
Because the first known object in a new class of asteroids will become the name of the new class, due consideration was given to the name for (163693). The other classes of near-Earth asteroids,
789:
Atira came within 0.207 AU (31,000,000 km) from Earth in January 2017, the closest since its discovery in 2003. This provided an opportunity to study the asteroid by
1660: 825:. Additional images taken on 23 January 2017 showed that the two components are orbiting each other at a distance of about 6 km with an orbital period of 15.5 hours. 1605: 1270: 1955: 1925: 841:, and Atens, are named after a Roman, Greek, and Egyptian god respectively, each of which begins with the letter 'A'. Atira follows this pattern, being named after 643: 444: 1626: 857:. Atiraʼ is the wife of the creator god, Tirawa, and goddess of Earth and the evening star. The official naming citation was published by the 1653: 782: 29: 1598: 639: 599: 164: 56: 678: 430: 1646: 851: 1777: 1591: 1412: 877: 51: 1950: 1124:
Deleon, Aaron P.; Becker, Tracy M.; Marshall, Sean E.; Pravec, Petr; Hornoch, Kamil; Kučáková, Hana; et al. (March 2023).
360: 1935: 1709: 289: 1868: 1940: 1552: 1694: 1317: 1099: 999: 68: 1858: 1848: 1177: 682: 504: 489: 436: 1945: 1853: 967: 63: 1930: 1689: 1399: 89: 1873: 1757: 1669: 1525: 533: 470: 452: 278: 265: 257: 1365: 908: 1794: 1057:
Rivera-Valentin, E. G.; Taylor, P. A.; Virkki, A.; Aponte-Hernandez, B. (January 2017). "(163693) Atira".
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Characterization of Asteroid (163693) Atira with Arecibo Radar and Multi-Epoch Photometric Observations
817:
is possibly elongated and very angular in shape. The secondary is tidally locked and has a diameter of
1767: 1513: 1505: 1497: 1481: 1473: 1465: 1440: 1289: 1261: 1234: 1152: 1066: 705: 300: 1434: 858: 794: 754: 709: 673:(< 0.983 AU), which means that they do not approach Earth as close as Atens do in general. 349: 33: 630:. The primary component with a diameter of approximately 4.8 kilometers (3 miles) is orbited by a 1279: 550: 1560: 1027: 1752: 1704: 806: 749: 701: 662: 631: 615: 384: 271: 231: 190: 37: 1878: 1544: 1536: 1297: 1242: 575: 518: 224: 216: 105: 1576: 1428: 1799: 1742: 1727: 1520: 1416: 1125: 842: 838: 802: 790: 740: 736: 697: 658: 650: 623: 539: 251: 154: 146: 1422: 1293: 1246: 1238: 1070: 1814: 1782: 1747: 1568: 1530: 1405: 713: 409: 330: 311: 210: 195: 1409: 781: 28: 1919: 1838: 1737: 1732: 854: 834: 721: 654: 200: 1904: 1677: 1204: 323: 181: 1225:
Shoemaker, E. M. (December 1982). "Asteroid and comet bombardment of the earth".
1133:. 54th Lunar and Planetary Science Conference 2023. Lunar and Planetary Institute 963: 1894: 1843: 1804: 725: 338: 1863: 1809: 670: 627: 235: 1899: 1789: 1638: 1302: 403: 1583: 1321: 1719: 1393: 1343: 1181: 846: 769:
was imaged by radar in early 2017. These radar images also revealed that
717: 666: 611: 393: 133: 1260:
de la Fuente Marcos, Carlos; de la Fuente Marcos, Raúl (1 August 2019).
1266:, a major step towards the future discovery of the Vatira population" 1028:"Asteroids with Satellites Database – (163693) Atira" 1284: 614:, dwelling in the interior of Earth's orbit. It is classified as a 1830: 780: 720:. With a perihelion of 0.50 AU the body also classifies as a 415: 1642: 1587: 587: 117: 809:, S/2017 (163693) 1, in orbit. The primary with a diameter of 681:
of 0.2059 AU (30,800,000 km) or approximately 80.1
1262:"Understanding the evolution of Atira-class asteroid 2019 AQ 638:
was discovered on 11 February 2003, by astronomers with the
1437: – Numbered Minor Planets (160001)–(165000) 1155:. NEODyS: Near Earth Objects – Dynamic Site 964:"JPL Small-Body Database Browser: 163693 Atira (2003 CP20)" 590: 578: 120: 108: 1178:"Lincoln Laboratory discovers inner Earth orbit asteroids" 700:
asteroid and orbits the Sun at a distance of 0.5–1.0 
1000:"Discovery Announcement of Binary System (163693) Atira" 739:
begins with its discovery observation in 2003. It has a
1153:"(163693) Atira – PHYSICAL INFORMATION" 940:, AISRI Dictionary Database Search, Indiana University. 1052: 1050: 1048: 649:
It is the namesake and the first numbered body of the
743:
of 3.3984 hours with a brightness variation of 0.36
584: 114: 1887: 1829: 1766: 1718: 1676: 785:
Arecibo follow-up observations from 23 January 2017
581: 548: 531: 516: 501: 486: 468: 450: 443: 428: 382: 370: 358: 348: 336: 321: 309: 299: 287: 277: 264: 250: 223: 209: 179: 162: 140: 111: 99: 87: 82: 74: 62: 50: 45: 1021: 1019: 1017: 626:, a system of two asteroids orbiting their common 1271:Monthly Notices of the Royal Astronomical Society 994: 992: 990: 988: 986: 984: 704:once every 8 months (233 days). Its orbit has an 657:, as both are near-Earth objects and both have a 665:). However, and contrary to Aten asteroids, the 646:near Socorro, New Mexico, in the United States. 1654: 1599: 1227:Annual Review of Earth and Planetary Sciences 634:that measures about 1 km (0.6 mi). 8: 1205:"Names of Solar System objects and features" 1119: 1117: 903: 901: 899: 897: 895: 893: 21: 1320:. Jet Propulsion Laboratory. Archived from 644:Lincoln Laboratory's Experimental Test Site 1682: 1661: 1647: 1639: 1606: 1592: 1584: 1529: 1180:. Lincoln Observatory, MIT. Archived from 1172: 1170: 669:for Atiras is always smaller than Earth's 661:smaller than that of Earth (< 1.0  27: 1445:NeoDyS-2, Near Earth Objects—Dynamic Site 1301: 1283: 1026:Johnston, Wm. Robert (19 February 2017). 958: 956: 954: 952: 950: 948: 946: 850:, an epithet of the Earth goddess of the 1402:, European Asteroid Research Node (EARN) 1956:Astronomical objects discovered in 2003 1926:Minor planet object articles (numbered) 1431:, Robert Johnston, johnstonsarchive.net 889: 1203:Wm. Robert Johnston (24 August 2006). 1094: 1092: 1090: 1088: 1086: 1084: 1082: 1080: 936:, University of Nebraska Press, 2008. 845: 132: 20: 1102:. Asteroid Lightcurve Database (LCDB) 361:Longitude of ascending node 7: 640:Lincoln Near-Earth Asteroid Research 1534: 1406:Asteroid Lightcurve Database (LCDB) 1247:10.1146/annurev.ea.11.050183.002333 1059:Central Bureau Electronic Telegrams 760:With a diameter of 4.8 kilometers, 679:minimum orbit intersection distance 14: 797:on 20 January 2017 revealed that 1423:Dictionary of Minor Planet Names 932:Douglas Parks & Lula Pratt, 574: 215: 104: 1344:"Ancient Gods & Goddesses" 1100:"LCDB Data for (163693) Atira" 1: 157:epithet of the earth goddess) 934:A Dictionary of Skiri Pawnee 36:discovery image of orbiting 435:0.2076 AU (80.88  373:Argument of perihelion 1972: 1400:Facts Sheet (163693) Atira 909:"163693 Atira (2003 CP20)" 182:Minor planet category 1685: 1670:Small Solar System bodies 1621: 1429:Asteroids with Satellites 968:Jet Propulsion Laboratory 563: 312:Orbital period (sidereal) 242: 230: 26: 1415:16 December 2017 at the 966:(2017-04-30 last obs.). 551:Absolute magnitude  445:Physical characteristics 165:Alternative designations 40:taken on 20 January 2017 1615:Minor planets navigator 1526:JPL Small-Body Database 1435:Discovery Circumstances 600:provisional designation 471:Synodic rotation period 225:Orbital characteristics 1951:Radar-imaged asteroids 1795:Trans-Neptunian object 1458:Observation prediction 786: 773:is a binary asteroid. 1936:Discoveries by LINEAR 1366:"MPC/MPO/MPS Archive" 1303:10.1093/mnras/stz1437 1002:. Arecibo Observatory 784: 244:Uncertainty parameter 1768:Distant minor planet 878:594913 ꞌAylóꞌchaxnim 861:on 22 January 2008 ( 716:with respect to the 90:MPC designation 1941:Named minor planets 1577:Physical parameters 1370:Minor Planet Center 1346:. www.godfinder.org 1294:2019MNRAS.487.2742D 1239:1983AREPS..11..461S 1071:2017CBET.4347....1R 913:Minor Planet Center 859:Minor Planet Center 795:Arecibo Observatory 689:Physical properties 75:Discovery date 64:Discovery site 23: 1490:Observational info 1324:on 2 February 2002 1184:on 10 October 2015 1032:Johnston's Archive 793:. Images taken at 787: 505:ecliptic longitude 52:Discovered by 1913: 1912: 1825: 1824: 1710:Meanings of names 1636: 1635: 807:minor-planet moon 801:is a synchronous 753:) and a very low 632:minor-planet moon 616:near-Earth object 567: 566: 490:ecliptic latitude 421:Type: synchronous 344:1° 32 41.64 / day 1963: 1946:Binary asteroids 1683: 1663: 1656: 1649: 1640: 1608: 1601: 1594: 1585: 1569:Orbital elements 1533: 1498:Close approaches 1381: 1380: 1378: 1376: 1362: 1356: 1355: 1353: 1351: 1340: 1334: 1333: 1331: 1329: 1314: 1308: 1307: 1305: 1287: 1278:(2): 2742–2752. 1257: 1251: 1250: 1222: 1216: 1215: 1213: 1211: 1200: 1194: 1193: 1191: 1189: 1174: 1165: 1164: 1162: 1160: 1149: 1143: 1142: 1140: 1138: 1132: 1121: 1112: 1111: 1109: 1107: 1096: 1075: 1074: 1054: 1043: 1042: 1040: 1038: 1023: 1012: 1011: 1009: 1007: 996: 979: 978: 976: 974: 960: 941: 930: 924: 923: 921: 919: 905: 867: 849: 847:[ətíɾəʔ] 824: 822: 816: 814: 752: 734: 608: 597: 596: 593: 592: 589: 586: 583: 580: 544: 527: 519:Geometric albedo 512: 497: 482: 480: 464: 462: 418: 406: 401: 238: 2458200.5) 219: 175: 158: 151:"my/our mother" 136: 134:[ətíɾəʔ] 131: 127: 126: 123: 122: 119: 116: 113: 110: 78:11 February 2003 31: 24: 1971: 1970: 1966: 1965: 1964: 1962: 1961: 1960: 1931:Atira asteroids 1916: 1915: 1914: 1909: 1883: 1821: 1762: 1714: 1672: 1667: 1637: 1632: 1617: 1612: 1514:Orbit animation 1482:Proper elements 1417:Wayback Machine 1390: 1385: 1384: 1374: 1372: 1364: 1363: 1359: 1349: 1347: 1342: 1341: 1337: 1327: 1325: 1316: 1315: 1311: 1265: 1259: 1258: 1254: 1224: 1223: 1219: 1209: 1207: 1202: 1201: 1197: 1187: 1185: 1176: 1175: 1168: 1158: 1156: 1151: 1150: 1146: 1136: 1134: 1130: 1123: 1122: 1115: 1105: 1103: 1098: 1097: 1078: 1056: 1055: 1046: 1036: 1034: 1025: 1024: 1015: 1005: 1003: 998: 997: 982: 972: 970: 962: 961: 944: 931: 927: 917: 915: 907: 906: 891: 886: 874: 862: 852:Native American 831: 820: 818: 812: 810: 803:binary asteroid 779: 748: 741:rotation period 737:observation arc 732: 708:of 0.32 and an 691: 683:lunar distances 659:semi-major axis 651:Atira asteroids 624:binary asteroid 607: 603: 577: 573: 556: 542: 536: 525: 521: 510: 507: 495: 492: 478: 476: 473: 460: 458: 455: 424: 413: 399: 397: 375: 363: 341: 326: 314: 292: 290:Semi-major axis 252:Observation arc 234:23 March 2018 ( 205: 184: 174: 170: 167: 152: 143: 129: 128: 107: 103: 92: 69:Lincoln Lab ETS 41: 17: 12: 11: 5: 1969: 1967: 1959: 1958: 1953: 1948: 1943: 1938: 1933: 1928: 1918: 1917: 1911: 1910: 1908: 1907: 1902: 1897: 1891: 1889: 1885: 1884: 1882: 1881: 1876: 1871: 1869:Near-parabolic 1866: 1861: 1856: 1851: 1846: 1841: 1835: 1833: 1827: 1826: 1823: 1822: 1820: 1819: 1818: 1817: 1815:Scattered disc 1812: 1807: 1802: 1792: 1787: 1786: 1785: 1783:Neptune trojan 1780: 1772: 1770: 1764: 1763: 1761: 1760: 1758:Spectral types 1755: 1750: 1748:Jupiter trojan 1745: 1740: 1735: 1730: 1724: 1722: 1716: 1715: 1713: 1712: 1707: 1702: 1697: 1692: 1686: 1680: 1674: 1673: 1668: 1666: 1665: 1658: 1651: 1643: 1634: 1633: 1631: 1630: 1622: 1619: 1618: 1613: 1611: 1610: 1603: 1596: 1588: 1582: 1581: 1580: 1579: 1537:Close approach 1518: 1517: 1516: 1438: 1432: 1426: 1425:, Google books 1420: 1408:, query form ( 1403: 1397: 1389: 1388:External links 1386: 1383: 1382: 1357: 1335: 1309: 1263: 1252: 1217: 1195: 1166: 1144: 1113: 1076: 1044: 1013: 980: 942: 925: 888: 887: 885: 882: 881: 880: 873: 870: 830: 827: 778: 775: 690: 687: 655:Aten asteroids 605: 565: 564: 561: 560: 557: 549: 546: 545: 537: 532: 529: 528: 522: 517: 514: 513: 508: 502: 499: 498: 493: 487: 484: 483: 474: 469: 466: 465: 456: 451: 448: 447: 441: 440: 433: 426: 425: 423: 422: 419: 407: 390: 387: 380: 379: 376: 371: 368: 367: 364: 359: 356: 355: 352: 346: 345: 342: 337: 334: 333: 327: 322: 319: 318: 315: 310: 307: 306: 303: 297: 296: 295:0.7411 AU 293: 288: 285: 284: 283:0.5024 AU 281: 275: 274: 268: 262: 261: 260:(5,192 d) 254: 248: 247: 240: 239: 228: 227: 221: 220: 213: 207: 206: 204: 203: 198: 193: 187: 185: 180: 177: 176: 172: 168: 163: 160: 159: 144: 141: 138: 137: 101: 97: 96: 95:(163693) Atira 93: 88: 85: 84: 80: 79: 76: 72: 71: 66: 60: 59: 54: 48: 47: 43: 42: 32: 15: 13: 10: 9: 6: 4: 3: 2: 1968: 1957: 1954: 1952: 1949: 1947: 1944: 1942: 1939: 1937: 1934: 1932: 1929: 1927: 1924: 1923: 1921: 1906: 1903: 1901: 1898: 1896: 1893: 1892: 1890: 1886: 1880: 1877: 1875: 1872: 1870: 1867: 1865: 1862: 1860: 1857: 1855: 1852: 1850: 1847: 1845: 1842: 1840: 1837: 1836: 1834: 1832: 1828: 1816: 1813: 1811: 1808: 1806: 1803: 1801: 1798: 1797: 1796: 1793: 1791: 1788: 1784: 1781: 1779: 1776: 1775: 1774: 1773: 1771: 1769: 1765: 1759: 1756: 1754: 1751: 1749: 1746: 1744: 1741: 1739: 1738:Asteroid belt 1736: 1734: 1733:Aten asteroid 1731: 1729: 1726: 1725: 1723: 1721: 1717: 1711: 1708: 1706: 1703: 1701: 1698: 1696: 1693: 1691: 1688: 1687: 1684: 1681: 1679: 1678:Minor planets 1675: 1671: 1664: 1659: 1657: 1652: 1650: 1645: 1644: 1641: 1629: 1628: 1624: 1623: 1620: 1616: 1609: 1604: 1602: 1597: 1595: 1590: 1589: 1586: 1578: 1574: 1570: 1566: 1562: 1561:Orbit diagram 1558: 1554: 1550: 1546: 1542: 1538: 1535: 1532: 1528: 1527: 1522: 1519: 1515: 1511: 1507: 1506:Physical info 1503: 1499: 1495: 1491: 1487: 1483: 1479: 1475: 1471: 1467: 1463: 1459: 1455: 1451: 1448: 1447: 1446: 1442: 1439: 1436: 1433: 1430: 1427: 1424: 1421: 1418: 1414: 1411: 1407: 1404: 1401: 1398: 1395: 1392: 1391: 1387: 1371: 1367: 1361: 1358: 1345: 1339: 1336: 1323: 1319: 1313: 1310: 1304: 1299: 1295: 1291: 1286: 1281: 1277: 1273: 1272: 1267: 1256: 1253: 1248: 1244: 1240: 1236: 1232: 1228: 1221: 1218: 1206: 1199: 1196: 1183: 1179: 1173: 1171: 1167: 1154: 1148: 1145: 1129: 1128: 1120: 1118: 1114: 1101: 1095: 1093: 1091: 1089: 1087: 1085: 1083: 1081: 1077: 1072: 1068: 1064: 1060: 1053: 1051: 1049: 1045: 1033: 1029: 1022: 1020: 1018: 1014: 1001: 995: 993: 991: 989: 987: 985: 981: 969: 965: 959: 957: 955: 953: 951: 949: 947: 943: 939: 935: 929: 926: 914: 910: 904: 902: 900: 898: 896: 894: 890: 883: 879: 876: 875: 871: 869: 865: 860: 856: 855:Pawnee people 853: 848: 844: 840: 836: 828: 826: 808: 804: 800: 796: 792: 783: 777:Binary system 776: 774: 772: 768: 763: 758: 756: 751: 746: 742: 738: 731: 727: 723: 722:Venus-crosser 719: 715: 711: 707: 703: 699: 695: 688: 686: 684: 680: 677:has an Earth 676: 672: 668: 664: 660: 656: 652: 647: 645: 641: 637: 633: 629: 625: 621: 617: 613: 610:) is a stony 609: 601: 595: 571: 562: 558: 555: 554: 547: 541: 538: 535: 534:Spectral type 530: 523: 520: 515: 509: 506: 500: 494: 491: 485: 481:0.0006 h 475: 472: 467: 457: 454: 453:Mean diameter 449: 446: 442: 438: 434: 432: 427: 420: 417: 411: 408: 405: 395: 392: 391: 388: 386: 381: 377: 374: 369: 365: 362: 357: 353: 351: 347: 343: 340: 335: 332: 328: 325: 320: 316: 313: 308: 304: 302: 298: 294: 291: 286: 282: 280: 276: 273: 269: 267: 263: 259: 255: 253: 249: 245: 241: 237: 233: 229: 226: 222: 218: 214: 212: 208: 202: 201:Venus-crosser 199: 197: 194: 192: 189: 188: 186: 183: 178: 169: 166: 161: 156: 150: 149: 145: 139: 135: 125: 102: 100:Pronunciation 98: 94: 91: 86: 81: 77: 73: 70: 67: 65: 61: 58: 55: 53: 49: 44: 39: 35: 30: 25: 19: 1905:Space debris 1627:163693 Atira 1625: 1572: 1564: 1556: 1548: 1540: 1524: 1521:163693 Atira 1509: 1501: 1493: 1485: 1477: 1469: 1466:Orbital info 1461: 1453: 1444: 1441:163693 Atira 1373:. Retrieved 1369: 1360: 1348:. Retrieved 1338: 1326:. Retrieved 1322:the original 1318:"NEO Groups" 1312: 1275: 1269: 1255: 1230: 1226: 1220: 1208:. Retrieved 1198: 1186:. Retrieved 1182:the original 1157:. Retrieved 1147: 1135:. Retrieved 1126: 1104:. Retrieved 1062: 1058: 1035:. Retrieved 1031: 1004:. Retrieved 971:. Retrieved 933: 928: 916:. Retrieved 912: 843:Atiraʼ 832: 798: 788: 770: 766: 761: 759: 729: 728:were found, 706:eccentricity 693: 692: 674: 648: 635: 619: 602: 570:163693 Atira 569: 568: 552: 324:Mean anomaly 301:Eccentricity 270:0.9798  148:Atíraʼ 147: 83:Designations 22:163693 Atira 18: 1895:Cosmic dust 1859:Long-period 1849:Halley-type 1805:Kuiper belt 1690:Designation 1450:Ephemerides 1396:at klet.org 1233:: 461–494. 1210:11 November 823:0.3 km 815:0.5 km 757:of 0.0231. 726:precoveries 710:inclination 463:0.5 km 429:Earth  350:Inclination 339:Mean motion 256:14.21  142:Named after 1920:Categories 1900:Meteoroids 1879:Sungrazing 1854:Hyperbolic 1810:Oort cloud 1753:Near-Earth 1328:9 December 1285:1905.08695 1137:4 February 884:References 671:perihelion 628:barycenter 414:15.5  385:satellites 279:Perihelion 1790:Damocloid 1553:Ephemeris 1545:Discovery 745:magnitude 543:(assumed) 526:(derived) 402:0.3  46:Discovery 38:satellite 1874:Periodic 1800:Detached 1720:Asteroid 1413:Archived 1375:21 April 1037:21 April 973:21 April 918:21 April 872:See also 718:ecliptic 667:aphelion 612:asteroid 317:233 days 266:Aphelion 16:Asteroid 1839:Extinct 1778:Centaur 1523:at the 1290:Bibcode 1235:Bibcode 1067:Bibcode 839:Apollos 805:with a 604:2003 CP 524:0.0231 378:252.93° 366:103.90° 354:25.618° 171:2003 CP 130:Pawnee: 34:Arecibo 1831:Comets 1743:Family 1728:Active 1695:Groups 1573:· 1571:  1565:· 1563:  1557:· 1555:  1549:· 1547:  1541:· 1539:  1510:· 1508:  1502:· 1500:  1494:· 1492:  1486:· 1484:  1478:· 1476:  1470:· 1468:  1462:· 1460:  1454:· 1452:  1350:29 May 1188:29 May 1159:29 May 1106:29 May 1006:29 May 864:M.P.C. 755:albedo 698:S-type 477:3.3984 383:Known 329:30.769 305:0.3221 211:Symbol 155:Pawnee 57:LINEAR 1888:Other 1844:Great 1575: 1567: 1559: 1551: 1543: 1512: 1504: 1496: 1488: 1480: 1472: 1464: 1456: 1394:Photo 1280:arXiv 1131:(PDF) 1065:: 1. 938:atira 866:61768 835:Amors 799:Atira 791:radar 771:Atira 767:Atira 762:Atira 733:' 730:Atira 712:of 26 696:is a 694:Atira 675:Atira 636:Atira 622:is a 620:Atira 503:Pole 488:Pole 232:Epoch 196:Atira 1864:Lost 1705:Moon 1700:List 1474:MOID 1410:info 1377:2018 1352:2017 1330:2015 1212:2016 1190:2017 1161:2017 1139:2023 1108:2017 1063:4347 1039:2018 1008:2017 975:2018 920:2018 829:Name 559:16.3 511:192° 496:−50° 431:MOID 1443:at 1298:doi 1276:487 1243:doi 868:). 819:1.0 811:4.8 750:U=2 642:at 553:(H) 459:4.8 398:1.0 191:NEO 1922:: 1368:. 1296:. 1288:. 1274:. 1268:. 1241:. 1231:11 1229:. 1169:^ 1116:^ 1079:^ 1061:. 1047:^ 1030:. 1016:^ 983:^ 945:^ 911:. 892:^ 837:, 735:s 702:AU 685:. 663:AU 618:. 606:20 598:; 588:ɪr 437:LD 412:: 404:km 396:: 272:AU 258:yr 236:JD 173:20 118:ɪr 1662:e 1655:t 1648:v 1607:e 1600:t 1593:v 1419:) 1379:. 1354:. 1332:. 1306:. 1300:: 1292:: 1282:: 1264:3 1249:. 1245:: 1237:: 1214:. 1192:. 1163:. 1141:. 1110:. 1073:. 1069:: 1041:. 1010:. 977:. 922:. 821:± 813:± 747:( 714:° 594:/ 591:ə 585:t 582:ˈ 579:ə 576:/ 572:( 540:S 479:± 461:± 439:) 416:h 410:P 400:± 394:D 389:1 331:° 246:0 153:( 124:/ 121:ə 115:t 112:ˈ 109:ə 106:/

Index


Arecibo
satellite
Discovered by
LINEAR
Discovery site
Lincoln Lab ETS
MPC designation
/əˈtɪrə/
[ətíɾəʔ]
Atíraʼ
Pawnee
Alternative designations
Minor planet category
NEO
Atira
Venus-crosser
Symbol

Orbital characteristics
Epoch
JD
Uncertainty parameter
Observation arc
yr
Aphelion
AU
Perihelion
Semi-major axis
Eccentricity

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