1757:
1745:
1156:
1974:
1694:
1751:
2247:
3216:
3142:
2385:
3192:
614:
3204:
3168:
2374:
3180:
710:(0.56 AU, 151 days). For comparison, Mercury has a semi-major axis of 0.39 AU and an orbital period of 88 days. Being so close to the Sun, at perihelion the asteroid is moving at 106 km/s (240,000 mph). The relativistic perihelion shift of this object is 1.6 times that of Mercury, which is 42.9 arcseconds per century.
732:
with the Sun in
October 2021, during which it will become unobservable at solar elongations less than 20 degrees. It currently comes closer to Venus than to any of the other planets. Deep close encounters with Venus control its long-term orbital evolution. As with many other Atira asteroids, it is
1100:
1128:
1391:
was discovered by the LINEAR survey and upon being tracked to a high-quality orbit was named 163693 Atira. Following historical precedent, we thus adopt the name Atira for this class of NEO, after its first named member (Schmadel,
1283:
1338:
1387:
Atira-class asteroids form part of what has been called
Interior-Earth Objects (IEOs) (Michel et al., 2000), because their orbits lie completely interior to Earth's orbit...The NEO 2003 CP
3029:
1379:
3241:
1792:
3062:
3251:
466:
of 106 km/s (240,000 mph). It also has the largest relativistic perihelion shift of any object orbiting the Sun, 1.6 times that of
Mercury. With an
728:
of 3. Nonetheless, additional observations are necessary to constrain uncertainties in its orbit by the time the asteroid approaches perihelion and enters
3077:
2491:
2459:
341:
3246:
605:
were found in archival Dark Energy Survey images from 16 July 2017. These observations were published by the Minor Planet Center on 10 October 2021.
2528:
2506:
1650:
839:
440:
54:
2683:
2668:
2591:
2293:
1973:
1693:
2733:
2678:
2673:
1969:
1288:
1133:
1105:
2628:
2596:
2486:
583:
92:
592:
by the Minor Planet Center and announced on 21 August 2021. Even in April 2021, the asteroid was never more than 45 degrees from the Sun.
2638:
2431:
678:
529:
331:
320:
309:
1073:
3082:
2690:
1109:(Perihelion occurs when deldot flips from negative to positive. VmagSn is velocity with respect to Sun.). Jet Propulsion Laboratory
524:
when it was on the far side of the Sun at an Earth distance of 1.3 AU (190 million km). It was then reported to the
532:
under the temporary designation v13aug1. Over five days, follow-up observations were conducted by various observatories including
1721:
960:
887:
707:
37:
1257:
271:
3108:
200:
3044:
2454:
3158:
2476:
2398:
2393:
2388:
1597:
2215:
3054:
2722:
2169:
1756:
1643:
669:, whose orbits are confined entirely within Earth's orbit at 1 AU from the Sun. Its orbit crosses the paths of
1733:
2523:
2471:
1069:
578:
572:
566:
560:
554:
548:
538:
49:
3236:
2309:
2282:
2260:
835:
533:
493:
75:
1028:
2864:
2753:
2744:
2546:
2424:
2246:
1575:
995:
923:
729:
543:
349:
189:
176:
1702:
1675:
1670:
1636:
509:
1539:
1507:
1499:
3067:
2481:
2327:
1485:
725:
297:
146:
1563:
1555:
1547:
1531:
1523:
1515:
1490:
1481:
3103:
2663:
2340:
2074:
2066:
1773:
1444:
1432:
1353:
1202:
926:
and not observable. When on the near side in solar conjunction, it can get fainter than magnitude 30.
646:
211:
3208:
2266:
2255:
1948:
1687:
1405:
965:
843:
650:
525:
416:
260:
2227:
2148:
3196:
3145:
2417:
2378:
2304:
1844:
1706:
915:
513:
489:
467:
428:
382:
366:
1744:
1605:
3072:
2603:
2501:
2210:
1784:
1714:
760:
737:
658:
638:
485:
424:
182:
134:
118:
42:
3172:
3039:
2233:
2166:
2038:
1589:
1581:
1452:
1369:
1361:
1210:
1065:
922:
on the far side of the Sun and in the full phase. But during perihelion it is also in solar
670:
517:
126:
1750:
1621:
3034:
3001:
2996:
2991:
2986:
2981:
2960:
2955:
2931:
2926:
2921:
2916:
2911:
2906:
2901:
2882:
2877:
2872:
2852:
2847:
2842:
2837:
2832:
2827:
2822:
2808:
2803:
2798:
2793:
2788:
2781:
2776:
2771:
2766:
2761:
2727:
2655:
2618:
2513:
2496:
2354:
2221:
2079:
1570:
747:
734:
714:
642:
470:
of 17.7, the asteroid is estimated to be larger than 1 kilometer (0.6 miles) in diameter.
451:
154:
1311:
955:
1448:
1357:
1206:
3220:
2623:
2576:
2566:
2464:
1613:
692:
666:
521:
455:
420:
241:
222:
110:
3230:
2645:
2613:
2608:
2571:
2518:
2160:
2033:
1838:
1431:
Müller, Thomas; Santana-Ros, Toni; Micheli, Marco; Pantin, Eric (23 September 2022).
819:
755:
459:
2207:
1433:"No one gets closer to the Sun: Thermophysical properties of Atira object 2021 PH27"
1261:
3215:
3184:
3133:
3098:
2650:
2556:
2010:
1925:
1765:
831:
625:
505:
234:
104:
1365:
3113:
2695:
2561:
2201:
2005:
1990:
1982:
1942:
1187:"Roaming the Relativistic Realm: Short-term Dynamical Evolution of Atira 2021 PH
249:
1215:
1186:
987:
1995:
1880:
919:
691:
holds the record for the smallest semi-major axis (0.46 AU) and shortest
665:
distance being less than 1.3 AU. It also falls under the NEO category of
662:
613:
463:
138:
2586:
2551:
2349:
2336:
2277:
2189:
2176:
2111:
2061:
2000:
1931:
1897:
1726:
855:
595:
357:
165:
1185:
de la Fuente Marcos, Carlos; de la Fuente Marcos, Raúl (8 September 2021).
3021:
2714:
2705:
2538:
2440:
2132:
2092:
2056:
2043:
1909:
1856:
1827:
1815:
1798:
1457:
1231:
875:
862:
697:
654:
501:
500:(its furthest distance from the Sun.) The observations were conducted at
497:
822:
is theorized to have caused numerous surface fractures on the asteroid.
2084:
2071:
2020:
1959:
1920:
1891:
1809:
436:
1374:
2154:
1339:"The orbital distribution of Near-Earth Objects inside Earth's orbit"
890:, the first asteroid discovered that always stays within Venus' orbit
808:
496:
in Chile on 13 August 2021, two days after the asteroid had reached
3179:
3128:
2015:
1284:"Horizons Batch for (2021 PH27) Solar Elongation on 13 April 2021"
674:
612:
432:
283:
2124:
1628:
1101:"Horizons Batch for (2021 PH27) at perihelion on 7 October 2021"
2413:
1632:
1337:
Greenstreet, Sarah; Ngo, Henry; Gladman, Brett (January 2012).
858:, a hypothetical population of asteroids within Mercury's orbit
2409:
1312:"MPEC 2021-T202 : DAILY ORBIT UPDATE (2021 October 10)"
1180:
1178:
1176:
1174:
811:. Due to the resulting temperature differences between
3156:
1095:
1093:
1091:
3091:
3053:
3020:
2863:
2752:
2743:
2713:
2704:
2537:
2447:
2318:
2243:
2141:
1968:
1782:
1764:
1686:
1195:
Research Notes of the
American Astronomical Society
380:
364:
347:
340:
329:
318:
307:
295:
281:
269:
259:
247:
232:
220:
210:
198:
188:
175:
163:
153:
125:
102:
90:
73:
68:
60:
48:
36:
31:
681:of 0.11 AU and 0.015 AU, respectively.
1260:. Project Pluto. 21 August 2021. Archived from
1232:"Re: v13aug1 - new shortest-period asteroid?!?"
950:
948:
946:
944:
942:
637:orbits the Sun at a distance of 0.13–0.79
1159:(Q < 0.983 (au)). Jet Propulsion Laboratory
1129:"Horizons Batch for (2021 PH27) at apmag 13.8"
695:(114 days) of any known asteroid, supplanting
2425:
1644:
1484:, 2 September 2021, NEO Coordination Centre,
784:0.01619 AU (2.422 million km)
458:among all known asteroids as of 2021, with a
8:
1066:"JPL Small-Body Database Browser: 2021 PH27"
1023:
1021:
1019:
1017:
1015:
1013:
884:, another low semi-major axis Atira asteroid
781:0.01617 AU (2.419 million km)
778:0.01618 AU (2.420 million km)
21:
1410:NASA Space Science Data Coordinated Archive
512:from the Sun. The object was discovered at
2749:
2710:
2432:
2418:
2410:
1651:
1637:
1629:
807:is heated up to temperatures of over 1000
3242:Minor planet object articles (unnumbered)
1495:NeoDyS-2, Near Earth Objects—Dynamic Site
1482:Record breaking Atira recently discovered
1456:
1373:
1214:
1060:
1058:
1056:
1054:
1052:
1050:
742:
3252:Astronomical objects discovered in 2021
3163:
1157:"JPL Small-Body Database Search Engine"
938:
900:
441:Cerro Tololo Inter-American Observatory
1443:. Europlanet Science Conference 2022.
1318:. Minor Planet Center. 10 October 2021
20:
16:Near-Earth asteroid of the Atira group
2662:Outer Solar System, does not include
1404:Williams, David R. (19 August 2021).
272:Longitude of ascending node
7:
871:, low semi-major axis Atira asteroid
679:minimum orbit intersection distances
1579:
1076:from the original on 27 August 2021
717:over 4 years, the orbit quality of
645:of 0.46 AU). Its orbit has an
530:Near-Earth Object Confirmation Page
1035:. International Astronomical Union
653:of 32 degrees with respect to the
14:
2353:(Mars orbit insertion: Feb 2021;
2339:(Mars orbit insertion: Feb 2021;
3247:Discoveries by Scott S. Sheppard
3214:
3202:
3190:
3178:
3166:
3141:
3140:
2635:Between Earth and the main belt
2384:
2383:
2372:
2333:(Mars orbit insertion: Feb 2021)
2245:
1972:
1755:
1749:
1743:
1692:
1316:Minor Planet Electronic Circular
1230:Tholen, David (21 August 2021).
961:Minor Planet Electronic Circular
956:"MPEC 2021-Q41 : 2021 PH27"
3030:Asteroids visited by spacecraft
641:once every 4 months (114 days;
2218:(rapidly-rotating brown dwarf)
818:'s lit-up and shadowed areas,
1:
484:was discovered by astronomer
2399:Category:2022 in outer space
2394:Category:2021 in outer space
2389:Category:2020 in outer space
1366:10.1016/j.icarus.2011.11.010
907:For example on 2023-May-03,
1292:. Jet Propulsion Laboratory
1258:""Pseudo-MPEC" for v13aug1"
1137:. Jet Propulsion Laboratory
504:to search for undiscovered
298:Argument of perihelion
3268:
1734:James Webb Space Telescope
1236:Minor Planets Mailing List
744:Venus Approach 2022-Oct-26
105:Minor planet category
3124:
3078:Discovering observatories
2367:
2300:(Bernardinelli-Bernstein)
1793:Asteroid close approaches
1741:
1664:
1070:Jet Propulsion Laboratory
746:(as known with a 4.15 yr
724:is well secured, with an
624:'s orbit compared to the
401:
223:Orbital period (sidereal)
145:
133:
2460:Physical characteristics
2310:P/2021 U3 (Attard-Maury)
2261:C/2021 J1 (Maury-Attard)
1216:10.3847/2515-5172/ac242e
1068:(2021-08-30 last obs.).
791:Physical characteristics
657:. It is classified as a
609:Orbit and classification
584:provisionally designated
494:Cerro Tololo Observatory
383:Absolute magnitude
342:Physical characteristics
93:Alternative designations
2360:Mars landing: May 2021)
2345:Mars landing: Feb 2021)
1576:JPL Small-Body Database
996:Las Cumbres Observatory
582:). The object was then
423:. It was discovered by
284:Time of perihelion
127:Orbital characteristics
3109:Asteroids in astrology
2379:Outer space portal
1703:Tiangong space station
1508:Observation prediction
735:von Zeipel-Lidov-Kozai
628:
2664:distant minor planets
2524:Palomar–Leiden survey
2482:Gravitational keyhole
2224:(massive white dwarf)
1486:European Space Agency
914:can get as bright as
726:uncertainty parameter
616:
228:0.31 yr (114.60 days)
147:Uncertainty parameter
3104:Asteroids in fiction
2075:circumplanetary disk
2067:OGLE-2019-BLG-0960Lb
1774:Winchcombe meteorite
1458:10.5194/epsc2022-524
1406:"Mercury Fact Sheet"
888:594913 ꞌAylóꞌchaxnim
826:Numbering and naming
708:594913 ꞌAylóꞌchaxnim
159:4.15 yr (1,515 days)
76:MPC designation
2256:C/2021 A1 (Leonard)
2157:(elliptical galaxy)
1622:Physical parameters
1449:2022EPSC...16..524M
1358:2012Icar..217..355G
1207:2021RNAAS...5..205D
1033:Minor Planet Center
966:Minor Planet Center
844:Minor Planet Center
751:
576:), and iTelescope (
526:Minor Planet Center
492:'s DECam imager at
443:on 13 August 2021.
417:near-Earth asteroid
61:Discovery date
50:Discovery site
28:
2583:Interior to Earth
2305:C/2021 T4 (Lemmon)
2039:Lambda Serpentis b
1690:telescope launches
1540:Observational info
916:apparent magnitude
743:
629:
514:apparent magnitude
490:Dark Energy Survey
468:absolute magnitude
429:Dark Energy Survey
367:Apparent magnitude
38:Discovered by
3154:
3153:
3016:
3015:
3012:
3011:
2455:Notable asteroids
2407:
2406:
2211:astrophysical jet
1983:Alpha Centauri Ab
1264:on 21 August 2021
834:has neither been
830:As of 2023, this
788:
787:
738:secular resonance
733:subjected to the
659:near-Earth object
450:has the smallest
405:
404:
375:14 (unobservable)
255:3° 8 28.602 / day
55:Cerro Tololo Obs.
3259:
3219:
3218:
3207:
3206:
3205:
3195:
3194:
3193:
3183:
3182:
3171:
3170:
3169:
3162:
3144:
3143:
2750:
2711:
2684:Neptune-crossers
2669:Jupiter-crossers
2656:Active asteroids
2592:Mercury-crossers
2492:Close approaches
2472:Impact avoidance
2434:
2427:
2420:
2411:
2387:
2386:
2377:
2376:
2375:
2299:
2288:
2274:
2272:
2271:
2267:(248370) 2005 QN
2249:
2216:2MASS J0348−6022
2197:
2195:
2194:
2184:
2182:
2181:
2151:(distant quasar)
2129:
1987:
1976:
1956:
1954:
1953:
1949:(163899) 2003 SD
1939:
1937:
1936:
1917:
1915:
1914:
1905:
1903:
1902:
1888:
1886:
1885:
1876:
1874:
1873:
1864:
1862:
1861:
1852:
1850:
1849:
1845:(231937) 2001 FO
1835:
1833:
1832:
1823:
1821:
1820:
1806:
1804:
1803:
1759:
1753:
1747:
1696:
1653:
1646:
1639:
1630:
1614:Orbital elements
1548:Close approaches
1470:
1469:
1467:
1465:
1460:
1428:
1422:
1421:
1419:
1417:
1401:
1395:
1394:
1385:on 29 May 2019.
1384:
1378:. Archived from
1377:
1343:
1334:
1328:
1327:
1325:
1323:
1308:
1302:
1301:
1299:
1297:
1280:
1274:
1273:
1271:
1269:
1254:
1248:
1247:
1245:
1243:
1227:
1221:
1220:
1218:
1182:
1169:
1168:
1166:
1164:
1153:
1147:
1146:
1144:
1142:
1125:
1119:
1118:
1116:
1114:
1097:
1086:
1085:
1083:
1081:
1062:
1045:
1044:
1042:
1040:
1025:
1008:
1007:
1005:
1003:
998:. 21 August 2021
984:
978:
977:
975:
973:
968:. 21 August 2021
952:
927:
913:
905:
883:
881:
880:
870:
868:
867:
817:
806:
752:
723:
705:
703:
702:
690:
636:
623:
617:Oblique view of
604:
598:observations of
591:
581:
575:
569:
563:
557:
551:
541:
518:solar elongation
508:situated at low
483:
449:
413:
397:
395:
376:
372:19.3 (discovery)
360:
86:
32:Discovery
29:
27:
3267:
3266:
3262:
3261:
3260:
3258:
3257:
3256:
3237:Atira asteroids
3227:
3226:
3225:
3213:
3203:
3201:
3191:
3189:
3177:
3167:
3165:
3157:
3155:
3150:
3120:
3087:
3049:
3008:
2859:
2739:
2700:
2679:Uranus-crossers
2674:Saturn-crossers
2577:Neptune trojans
2567:Jupiter trojans
2533:
2443:
2438:
2408:
2403:
2373:
2371:
2363:
2320:
2314:
2298:
2294:
2287:
2283:
2269:
2268:
2265:
2239:
2204:(spiral galaxy)
2192:
2191:
2188:
2179:
2178:
2175:
2163:sextuple system
2137:
2127:
2080:TIC 172900988 b
2034:Lalande 21185 c
1985:
1964:
1951:
1950:
1947:
1934:
1933:
1930:
1912:
1911:
1908:
1900:
1899:
1896:
1883:
1882:
1879:
1871:
1870:
1867:
1859:
1858:
1855:
1847:
1846:
1843:
1830:
1829:
1826:
1818:
1817:
1814:
1801:
1800:
1797:
1778:
1760:
1754:
1748:
1739:
1689:
1688:Space probe and
1682:
1679:
1673:
1660:
1657:
1564:Orbit animation
1532:Proper elements
1478:
1473:
1463:
1461:
1430:
1429:
1425:
1415:
1413:
1403:
1402:
1398:
1390:
1382:
1341:
1336:
1335:
1331:
1321:
1319:
1310:
1309:
1305:
1295:
1293:
1282:
1281:
1277:
1267:
1265:
1256:
1255:
1251:
1241:
1239:
1229:
1228:
1224:
1190:
1184:
1183:
1172:
1162:
1160:
1155:
1154:
1150:
1140:
1138:
1127:
1126:
1122:
1112:
1110:
1099:
1098:
1089:
1079:
1077:
1064:
1063:
1048:
1038:
1036:
1027:
1026:
1011:
1001:
999:
986:
985:
981:
971:
969:
954:
953:
940:
936:
931:
930:
918:13.8 when near
912:
908:
906:
902:
897:
878:
877:
874:
865:
864:
861:
852:
828:
816:
812:
805:
801:
798:
793:
772:
767:
758:
748:observation arc
745:
722:
718:
715:observation arc
700:
699:
696:
689:
685:
677:, with nominal
667:Atira asteroids
649:of 0.71 and an
643:semi-major axis
635:
631:
622:
618:
611:
603:
599:
590:
586:
577:
571:
565:
559:
553:
547:
537:
482:
478:
476:
452:semi-major axis
448:
444:
412:
408:
393:
391:
388:
374:
373:
369:
355:
352:
300:
290:
286:
274:
252:
237:
225:
203:
201:Semi-major axis
155:Observation arc
107:
95:
85:
81:
78:
26:
22:
17:
12:
11:
5:
3265:
3263:
3255:
3254:
3249:
3244:
3239:
3229:
3228:
3224:
3223:
3211:
3199:
3187:
3175:
3152:
3151:
3149:
3148:
3137:
3136:
3131:
3125:
3122:
3121:
3119:
3118:
3117:
3116:
3106:
3101:
3095:
3093:
3089:
3088:
3086:
3085:
3083:Space missions
3080:
3075:
3070:
3065:
3059:
3057:
3051:
3050:
3048:
3047:
3042:
3037:
3032:
3026:
3024:
3018:
3017:
3014:
3013:
3010:
3009:
3007:
3006:
3005:
3004:
2999:
2994:
2989:
2984:
2974:
2973:
2972:
2969:
2966:
2963:
2952:
2951:
2950:
2949:
2946:
2943:
2940:
2937:
2934:
2929:
2924:
2919:
2914:
2909:
2899:
2898:
2897:
2894:
2891:
2888:
2885:
2880:
2869:
2867:
2861:
2860:
2858:
2857:
2856:
2855:
2850:
2845:
2840:
2835:
2830:
2825:
2814:
2813:
2812:
2811:
2806:
2801:
2791:
2786:
2785:
2784:
2779:
2774:
2769:
2758:
2756:
2747:
2741:
2740:
2738:
2737:
2730:
2725:
2719:
2717:
2708:
2706:Classification
2702:
2701:
2699:
2698:
2693:
2688:
2687:
2686:
2681:
2676:
2671:
2660:
2659:
2658:
2653:
2643:
2642:
2641:
2633:
2632:
2631:
2629:Earth-crossers
2626:
2621:
2616:
2611:
2601:
2600:
2599:
2597:Venus-crossers
2594:
2589:
2581:
2580:
2579:
2574:
2572:Uranus trojans
2569:
2564:
2559:
2554:
2543:
2541:
2535:
2534:
2532:
2531:
2529:Contact binary
2526:
2521:
2516:
2511:
2510:
2509:
2504:
2494:
2489:
2484:
2479:
2474:
2469:
2468:
2467:
2465:dynamic method
2457:
2451:
2449:
2445:
2444:
2439:
2437:
2436:
2429:
2422:
2414:
2405:
2404:
2402:
2401:
2381:
2368:
2365:
2364:
2362:
2361:
2346:
2334:
2324:
2322:
2316:
2315:
2313:
2312:
2307:
2302:
2296:
2291:
2285:
2280:
2275:
2263:
2258:
2252:
2250:
2241:
2240:
2238:
2237:
2236:(radio source)
2231:
2228:WISE 1534–1043
2225:
2222:ZTF J1901+1458
2219:
2213:
2205:
2199:
2186:
2173:
2164:
2158:
2152:
2149:QSO J0313−1806
2145:
2143:
2139:
2138:
2136:
2135:
2130:
2122:
2121:
2120:
2117:
2109:
2108:
2107:
2104:
2101:
2098:
2095:
2090:
2082:
2077:
2069:
2064:
2059:
2054:
2053:
2052:
2049:
2041:
2036:
2031:
2030:
2029:
2026:
2018:
2013:
2008:
2003:
1998:
1993:
1988:
1979:
1977:
1966:
1965:
1963:
1962:
1957:
1945:
1940:
1928:
1923:
1918:
1906:
1894:
1889:
1877:
1865:
1853:
1841:
1836:
1824:
1812:
1807:
1795:
1789:
1787:
1780:
1779:
1777:
1776:
1770:
1768:
1762:
1761:
1742:
1740:
1738:
1737:
1731:
1719:
1711:
1699:
1697:
1684:
1683:
1681:
1680:
1674:
1668:
1665:
1662:
1661:
1658:
1656:
1655:
1648:
1641:
1633:
1627:
1626:
1625:
1624:
1582:Close approach
1568:
1567:
1566:
1488:
1477:
1476:External links
1474:
1472:
1471:
1437:EPSC Abstracts
1423:
1396:
1388:
1352:(1): 355–366.
1329:
1303:
1275:
1249:
1222:
1188:
1170:
1148:
1120:
1087:
1046:
1009:
979:
937:
935:
932:
929:
928:
910:
899:
898:
896:
893:
892:
891:
885:
872:
859:
851:
848:
827:
824:
814:
803:
800:At perihelion
797:
794:
792:
789:
786:
785:
782:
779:
775:
774:
773:distance (AU)
769:
768:distance (AU)
764:
720:
693:orbital period
687:
661:(NEO) due its
633:
620:
610:
607:
601:
588:
486:Scott Sheppard
480:
475:
472:
456:orbital period
446:
425:Scott Sheppard
410:
403:
402:
399:
398:
389:
381:
378:
377:
370:
365:
362:
361:
353:
348:
345:
344:
338:
337:
334:
327:
326:
323:
316:
315:
312:
305:
304:
301:
296:
293:
292:
289:7 October 2021
287:
282:
279:
278:
275:
270:
267:
266:
263:
257:
256:
253:
248:
245:
244:
238:
233:
230:
229:
226:
221:
218:
217:
214:
208:
207:
204:
199:
196:
195:
192:
186:
185:
179:
173:
172:
169:
161:
160:
157:
151:
150:
143:
142:
131:
130:
123:
122:
108:
103:
100:
99:
98:v13aug1
96:
91:
88:
87:
83:
79:
74:
71:
70:
66:
65:
64:13 August 2021
62:
58:
57:
52:
46:
45:
43:S. S. Sheppard
40:
34:
33:
24:
15:
13:
10:
9:
6:
4:
3:
2:
3264:
3253:
3250:
3248:
3245:
3243:
3240:
3238:
3235:
3234:
3232:
3222:
3217:
3212:
3210:
3200:
3198:
3188:
3186:
3181:
3176:
3174:
3164:
3160:
3147:
3139:
3138:
3135:
3132:
3130:
3127:
3126:
3123:
3115:
3112:
3111:
3110:
3107:
3105:
3102:
3100:
3097:
3096:
3094:
3090:
3084:
3081:
3079:
3076:
3074:
3071:
3069:
3068:Minor planets
3066:
3064:
3061:
3060:
3058:
3056:
3052:
3046:
3043:
3041:
3038:
3036:
3033:
3031:
3028:
3027:
3025:
3023:
3019:
3003:
3000:
2998:
2995:
2993:
2990:
2988:
2985:
2983:
2980:
2979:
2978:
2975:
2970:
2967:
2964:
2962:
2959:
2958:
2957:
2954:
2953:
2947:
2944:
2941:
2938:
2935:
2933:
2930:
2928:
2925:
2923:
2920:
2918:
2915:
2913:
2910:
2908:
2905:
2904:
2903:
2900:
2895:
2892:
2889:
2886:
2884:
2881:
2879:
2876:
2875:
2874:
2871:
2870:
2868:
2866:
2862:
2854:
2851:
2849:
2846:
2844:
2841:
2839:
2836:
2834:
2831:
2829:
2826:
2824:
2821:
2820:
2819:
2818:small classes
2816:
2815:
2810:
2807:
2805:
2802:
2800:
2797:
2796:
2795:
2792:
2790:
2787:
2783:
2780:
2778:
2775:
2773:
2770:
2768:
2765:
2764:
2763:
2760:
2759:
2757:
2755:
2751:
2748:
2746:
2742:
2736:
2735:
2731:
2729:
2726:
2724:
2721:
2720:
2718:
2716:
2712:
2709:
2707:
2703:
2697:
2694:
2692:
2689:
2685:
2682:
2680:
2677:
2675:
2672:
2670:
2667:
2666:
2665:
2661:
2657:
2654:
2652:
2649:
2648:
2647:
2646:Asteroid belt
2644:
2640:
2639:Mars crossers
2637:
2636:
2634:
2630:
2627:
2625:
2622:
2620:
2617:
2615:
2612:
2610:
2607:
2606:
2605:
2602:
2598:
2595:
2593:
2590:
2588:
2585:
2584:
2582:
2578:
2575:
2573:
2570:
2568:
2565:
2563:
2560:
2558:
2557:Earth trojans
2555:
2553:
2550:
2549:
2548:
2545:
2544:
2542:
2540:
2536:
2530:
2527:
2525:
2522:
2520:
2519:Asteroid pair
2517:
2515:
2512:
2508:
2505:
2503:
2500:
2499:
2498:
2495:
2493:
2490:
2488:
2487:Earth-crosser
2485:
2483:
2480:
2478:
2475:
2473:
2470:
2466:
2463:
2462:
2461:
2458:
2456:
2453:
2452:
2450:
2446:
2442:
2435:
2430:
2428:
2423:
2421:
2416:
2415:
2412:
2400:
2396:
2395:
2390:
2382:
2380:
2370:
2369:
2366:
2359:
2357:
2352:
2351:
2347:
2344:
2343:
2338:
2335:
2332:
2330:
2326:
2325:
2323:
2317:
2311:
2308:
2306:
2303:
2301:
2292:
2290:
2281:
2279:
2276:
2273:
2264:
2262:
2259:
2257:
2254:
2253:
2251:
2248:
2242:
2235:
2234:Andy's object
2232:
2230:(brown dwarf)
2229:
2226:
2223:
2220:
2217:
2214:
2212:
2209:
2206:
2203:
2200:
2196:
2187:
2183:
2174:
2171:
2168:
2165:
2162:
2161:TIC 168789840
2159:
2156:
2153:
2150:
2147:
2146:
2144:
2140:
2134:
2131:
2128:(unconfirmed)
2126:
2123:
2118:
2115:
2114:
2113:
2110:
2105:
2102:
2099:
2096:
2094:
2091:
2088:
2087:
2086:
2083:
2081:
2078:
2076:
2073:
2070:
2068:
2065:
2063:
2060:
2058:
2055:
2050:
2047:
2046:
2045:
2042:
2040:
2037:
2035:
2032:
2027:
2024:
2023:
2022:
2019:
2017:
2014:
2012:
2009:
2007:
2004:
2002:
1999:
1997:
1994:
1992:
1989:
1986:(unconfirmed)
1984:
1981:
1980:
1978:
1975:
1971:
1967:
1961:
1958:
1955:
1946:
1944:
1941:
1938:
1929:
1927:
1924:
1922:
1919:
1916:
1907:
1904:
1895:
1893:
1890:
1887:
1878:
1875:
1866:
1863:
1854:
1851:
1842:
1840:
1839:99942 Apophis
1837:
1834:
1825:
1822:
1813:
1811:
1808:
1805:
1796:
1794:
1791:
1790:
1788:
1786:
1781:
1775:
1772:
1771:
1769:
1767:
1766:Impact events
1763:
1758:
1752:
1746:
1735:
1732:
1729:
1728:
1723:
1720:
1717:
1716:
1712:
1709:
1708:
1704:
1701:
1700:
1698:
1695:
1691:
1685:
1677:
1672:
1667:
1666:
1663:
1659:2021 in space
1654:
1649:
1647:
1642:
1640:
1635:
1634:
1631:
1623:
1619:
1615:
1611:
1607:
1606:Orbit diagram
1603:
1599:
1595:
1591:
1587:
1583:
1580:
1578:
1577:
1572:
1569:
1565:
1561:
1557:
1556:Physical info
1553:
1549:
1545:
1541:
1537:
1533:
1529:
1525:
1521:
1517:
1513:
1509:
1505:
1501:
1498:
1497:
1496:
1492:
1489:
1487:
1483:
1480:
1479:
1475:
1459:
1454:
1450:
1446:
1442:
1438:
1434:
1427:
1424:
1411:
1407:
1400:
1397:
1393:
1381:
1376:
1371:
1367:
1363:
1359:
1355:
1351:
1347:
1340:
1333:
1330:
1317:
1313:
1307:
1304:
1291:
1290:
1285:
1279:
1276:
1263:
1259:
1253:
1250:
1237:
1233:
1226:
1223:
1217:
1212:
1208:
1204:
1200:
1196:
1192:
1181:
1179:
1177:
1175:
1171:
1158:
1152:
1149:
1136:
1135:
1130:
1124:
1121:
1108:
1107:
1102:
1096:
1094:
1092:
1088:
1075:
1071:
1067:
1061:
1059:
1057:
1055:
1053:
1051:
1047:
1034:
1030:
1024:
1022:
1020:
1018:
1016:
1014:
1010:
997:
993:
989:
983:
980:
967:
963:
962:
957:
951:
949:
947:
945:
943:
939:
933:
925:
921:
917:
904:
901:
894:
889:
886:
882:
873:
869:
860:
857:
854:
853:
849:
847:
845:
841:
837:
833:
825:
823:
821:
820:thermal shock
810:
795:
790:
783:
780:
777:
776:
770:
765:
762:
757:
754:
753:
749:
741:
739:
736:
731:
727:
716:
711:
709:
704:
694:
682:
680:
676:
672:
668:
664:
660:
656:
652:
648:
644:
640:
627:
626:inner planets
615:
608:
606:
597:
593:
585:
580:
574:
568:
562:
556:
550:
545:
540:
535:
531:
527:
523:
519:
515:
511:
507:
506:minor planets
503:
499:
495:
491:
487:
473:
471:
469:
465:
461:
457:
454:and shortest
453:
442:
438:
434:
430:
426:
422:
418:
414:
400:
390:
387:
386:
379:
371:
368:
363:
359:
354:
351:
350:Mean diameter
346:
343:
339:
335:
333:
328:
324:
322:
319:Mercury
317:
313:
311:
306:
302:
299:
294:
288:
285:
280:
276:
273:
268:
264:
262:
258:
254:
251:
246:
243:
239:
236:
231:
227:
224:
219:
215:
213:
209:
205:
202:
197:
193:
191:
187:
184:
180:
178:
174:
170:
167:
162:
158:
156:
152:
148:
144:
140:
137:1 July 2021 (
136:
132:
128:
124:
120:
116:
112:
109:
106:
101:
97:
94:
89:
80:
77:
72:
67:
63:
59:
56:
53:
51:
47:
44:
41:
39:
35:
30:
19:
3209:Solar System
3134:Minor planet
3099:Asteroid Day
3045:Colonization
2976:
2817:
2732:
2696:Exoasteroids
2651:Kirkwood gap
2562:Mars trojans
2552:Venus trojan
2539:Distribution
2392:
2355:
2348:
2342:Perseverance
2341:
2331:Mars mission
2328:
2011:Kepler-1704b
1926:3361 Orpheus
1868:
1725:
1713:
1710:(April 2021)
1705:
1617:
1609:
1601:
1593:
1585:
1574:
1559:
1551:
1543:
1535:
1527:
1519:
1516:Orbital info
1511:
1503:
1494:
1462:. Retrieved
1440:
1436:
1426:
1414:. Retrieved
1409:
1399:
1386:
1380:the original
1349:
1345:
1332:
1320:. Retrieved
1315:
1306:
1294:. Retrieved
1289:JPL Horizons
1287:
1278:
1266:. Retrieved
1262:the original
1252:
1240:. Retrieved
1235:
1225:
1198:
1194:
1161:. Retrieved
1151:
1139:. Retrieved
1134:JPL Horizons
1132:
1123:
1111:. Retrieved
1106:JPL Horizons
1104:
1078:. Retrieved
1037:. Retrieved
1032:
1000:. Retrieved
992:NEO Exchange
991:
982:
970:. Retrieved
959:
903:
832:minor planet
829:
799:
712:
684:As of 2021,
683:
647:eccentricity
630:
594:
534:Las Campanas
477:
407:
406:
384:
235:Mean anomaly
212:Eccentricity
171:16 July 2017
114:
69:Designations
18:
3197:Spaceflight
3114:occultation
3022:Exploration
2977:small types
2321:exploration
2289:(PanSTARRS)
2202:ALESS 073.1
2142:Discoveries
2006:HD 110082 b
2001:HD 108236 f
1991:COCONUTS-2b
1943:4660 Nereus
1500:Ephemerides
1464:10 February
1238:. groups.io
1141:1 September
1029:"2021 PH27"
988:"2021 PH27"
924:conjunction
796:Temperature
730:conjunction
651:inclination
570:), SONEAR (
544:Las Cumbres
516:19, with a
510:elongations
421:Atira group
356:>1
330:Venus
308:Earth
261:Inclination
250:Mean motion
3231:Categories
3063:Near-Earth
2604:Near-Earth
2587:Vulcanoids
2170:black hole
1996:Gliese 486
1970:Exoplanets
1736:(Dec 2021)
1730:(Nov 2021)
1718:(Oct 2021)
1375:2429/37251
1322:10 October
1201:(9): 205.
934:References
920:perihelion
856:Vulcanoids
759:distance (
663:perihelion
488:using the
464:perihelion
435:imager at
427:using the
291:@ 106 km/s
190:Perihelion
141:2459396.5)
3173:Astronomy
2441:Asteroids
2350:Tianwen-1
2337:Mars 2020
2295:C/2014 UN
2284:C/2014 OG
2278:8P/Tuttle
2172:candidate
2062:NGTS-14Ab
1783:Selected
1727:LICIACube
1598:Ephemeris
1590:Discovery
1571:2021 PH27
1491:2021 PH27
1416:21 August
1296:28 August
1268:21 August
1242:21 August
1163:21 August
1113:26 August
1080:21 August
1039:21 August
1002:21 August
972:21 August
596:Precovery
474:Discovery
336:0.0147 AU
325:0.1123 AU
314:0.2251 AU
206:0.4617 AU
194:0.1331 AU
166:precovery
164:Earliest
3146:Category
2745:Spectral
2691:Centaurs
2477:Tracking
2208:PJ352–15
2167:V723 Mon
2133:YSES 2 b
2057:NGTS-13b
2044:LHS 1678
1074:Archived
850:See also
836:numbered
713:With an
655:ecliptic
564:), and (
502:twilight
498:aphelion
460:velocity
177:Aphelion
3221:Science
3159:Portals
3092:Related
3040:Capture
2992:Ld-type
2956:X-group
2902:S-group
2873:C-group
2794:X-group
2762:C-group
2715:Orbital
2547:Trojans
2507:contact
2356:Zhurong
2244:Comets
2190:2021 DR
2177:2018 AG
2112:TOI-755
2085:TOI-178
2072:PDS 70c
2021:L 98-59
2016:KOI-5Ab
1960:2018 AH
1932:1994 WR
1921:2019 XS
1910:2021 UA
1898:2021 TP
1892:2021 SG
1881:2016 AJ
1869:2021 PH
1857:2021 GW
1828:2021 DW
1816:2016 DV
1810:2020 XR
1799:2021 AV
1678: »
1669:«
1573:at the
1445:Bibcode
1354:Bibcode
1203:Bibcode
909:2021 PH
876:2019 AQ
863:2019 LF
842:by the
813:2021 PH
802:2021 PH
771:Maximum
766:Minimum
756:Nominal
719:2021 PH
698:2019 LF
686:2021 PH
671:Mercury
632:2021 PH
619:2021 PH
600:2021 PH
587:2021 PH
522:degrees
479:2021 PH
445:2021 PH
437:NOIRLab
419:of the
409:2021 PH
277:39.411°
265:31.929°
181:0.7903
129:
121:
82:2021 PH
23:2021 PH
3035:Mining
3002:V-type
2997:O-type
2987:D-type
2982:T-type
2961:X-type
2932:S-type
2927:L-type
2922:K-type
2917:R-type
2912:Q-type
2907:A-type
2883:C-type
2878:B-type
2853:V-type
2848:R-type
2843:Q-type
2838:T-type
2833:J-type
2828:D-type
2823:A-type
2809:P-type
2804:E-type
2799:M-type
2789:S-type
2782:C-type
2777:G-type
2772:F-type
2767:B-type
2754:Tholen
2734:(list)
2728:Family
2619:Apollo
2514:Active
2497:Binary
2319:Space
2155:ID2299
2125:Vega b
1707:Tianhe
1618:·
1616:
1610:·
1608:
1602:·
1600:
1594:·
1592:
1586:·
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1560:·
1558:
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1536:·
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1528:·
1526:
1520:·
1518:
1512:·
1510:
1504:·
1502:
1412:. NASA
1392:2009).
1346:Icarus
520:of 37
303:8.575°
240:49.496
216:0.7116
115:·
113:
3185:Stars
3129:Comet
3055:Lists
2865:SMASS
2723:Group
2624:Atira
2358:rover
2198:(TNO)
2185:(TNO)
1620:
1612:
1604:
1596:
1588:
1562:
1554:
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1538:
1530:
1522:
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1506:
1383:(PDF)
1342:(PDF)
895:Notes
840:named
675:Venus
433:DECam
415:is a
396:0.235
392:17.71
135:Epoch
117:
111:Atira
3073:Lost
2614:Amor
2609:Aten
2502:moon
2448:Main
2329:Hope
1785:NEOs
1722:DART
1715:Lucy
1676:2022
1671:2020
1524:MOID
1466:2023
1418:2021
1324:2021
1298:2021
1270:2021
1244:2021
1165:2021
1143:2021
1115:2021
1082:2021
1041:2021
1004:2021
974:2021
838:nor
706:and
673:and
558:), (
552:), (
332:MOID
321:MOID
310:MOID
168:date
2893:Cgh
2297:271
2286:392
2270:173
1952:220
1884:193
1493:at
1453:doi
1370:hdl
1362:doi
1350:217
1211:doi
579:Q62
573:Y00
567:Q63
561:W87
555:W85
549:K91
542:),
539:304
528:'s
462:at
439:'s
431:'s
385:(H)
119:NEO
3233::
2971:Xk
2968:Xc
2965:Xe
2948:Sl
2945:Sk
2942:Sr
2939:Sq
2936:Sa
2896:Cb
2890:Ch
2887:Cg
2397:—
2391:—
2193:15
2180:37
2028:f?
1935:12
1901:21
1872:27
1848:32
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1131:.
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1012:^
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990:.
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958:.
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911:27
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815:27
804:27
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761:AU
750:)
740:.
721:27
688:27
639:AU
634:27
621:27
602:27
589:27
481:27
447:27
411:27
358:km
183:AU
139:JD
84:27
25:27
3161::
2433:e
2426:t
2419:v
2119:c
2116:b
2106:g
2103:f
2100:e
2097:d
2093:c
2089:b
2051:c
2048:b
2025:e
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879:3
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242:°
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