497:
1297:
29:
724:
that was launched on 16 October 2021. The flyby is scheduled for 20 April 2025, and will approach the asteroid to a distance of 922 kilometers (573 mi) at a relative velocity of 13.4 kilometers (8.3 mi) per second.
949:
Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Dailey, J.; et al. (November 2011). "Main Belt
Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters".
919:
1426:
1716:
1371:
1721:
1691:
336:
1419:
1392:
1701:
1135:
1364:
670:
1711:
1005:
Levison, Harold F.; Olkin, Catherine B.; Noll, Keith S.; Marchi, Simone; Bell III, James F.; Bierhaus, Edward; et al. (October 2021).
121:
698:
1412:
1543:
1084:
1357:
1216:
48:
689:
telescopes from
November 2020 to February 2021 determined the rotation period of Donaldjohanson to be approximately 252 hours.
313:
1475:
242:
1634:
1134:
Ferrais, Marin; Jehin, Emmanuel; Manfroid, Jean; Moulane, Youssef; Barkaoui, Khalid; Benkhaldoun, Zouhair (October 2021).
1706:
1318:
1460:
1160:
1049:
Nesvorný, D.; Broz, M.; Carruba, V. (December 2014). "Identification and
Dynamical Properties of Asteroid Families".
1696:
1624:
1614:
496:
681:. The lightcurve suggests that Donaldjohanson must either be highly elongated in shape, or possibly a synchronous
1619:
849:
466:
65:
60:
461:, approximately 4 kilometers (2.5 miles) in diameter. It was discovered on 2 March 1981, by American astronomer
1455:
86:
1639:
1523:
1435:
1291:
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485:
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365:
344:
231:
218:
28:
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1560:
811:
765:
654:
34:
1112:
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678:
325:
198:
1279:
1255:
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1533:
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1064:
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614:
253:
1271:
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1238:
760:
756:
706:
618:
302:
111:
1090:
1054:
984:
958:
658:
419:
1326:
1518:
1470:
1080:
779:
739:
718:
606:
474:
224:
186:
1644:
1310:
1302:
1076:
1072:
1026:
976:
386:
179:
1342:
1565:
1508:
1493:
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1220:
880:
752:
744:
650:
646:
634:
610:
588:
481:
470:
410:
104:
1296:
1226:
1068:
1022:
972:
895:
881:"Lucy: Surveying the Diversity of the Trojan Asteroids: The Fossils of Planet Formation"
1580:
1548:
1513:
1334:
1209:
622:
578:
283:
264:
171:
1213:
598:. It is a relatively old family that was created approximately 130 million years ago.
1685:
1604:
1503:
1498:
1094:
988:
980:
705:
mission, Donaldjohanson measures 3.895 kilometers in diameter and its surface has an
682:
458:
1670:
1443:
734:
602:
276:
165:
149:
845:
1660:
1609:
1570:
1137:
Rotation period determination of NASA Lucy mission target (52246) Donaldjohanson
669:
Photometric observations of
Donaldjohanson in August 2020 revealed that it is a
633:
was taken at the discovering observatory in
February 1981, extending the body's
595:
592:
462:
291:
53:
1629:
1575:
674:
190:
1665:
1555:
1404:
879:
Levison, H. F.; Olkin, C.; Noll, K. S.; Marchi, S.; Lucy Team (March 2017).
630:
356:
207:
155:
1349:
743:
spacecraft, which would observe it en route to its main target of several
1485:
1031:
1006:
686:
626:
454:
702:
583:
920:"Asteroid 52246 Donaldjohanson – Nesvorny HCM Asteroid Families V3.0"
1161:"NASA announces five Discovery proposals selected for further study"
1059:
1596:
963:
846:"JPL Small-Body Database Browser: 52246 Donaldjohanson (1981 EQ5)"
495:
751:, while Donaldjohanson is named for that fossil's co-discoverer
377:
1408:
1353:
1233:
1140:. 53rd Annual DPS Meeting. American Astronomical Society. 1226
1113:"Is the Lucy Mission Target (52246) Donaldjohanson a Binary?"
1115:(HST Proposal 16452). Mikulski Archive for Space Telescopes
645:
Donaldjohanson has been characterized as a carbonaceous
637:
by 2 weeks prior to its official discovery observation.
591:
of nearly 2,000 known members, which is named after its
480:
and was aptly named after
American paleoanthropologist
1007:"Lucy Mission to the Trojan Asteroids: Science Goals"
1159:
Casey Dreier; Emily
Lakdawalla (30 September 2015).
759:. The approved naming citation was published by the
1653:
1595:
1532:
1484:
1442:
417:
402:
384:
363:
342:
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205:
178:
147:
119:
98:
84:
79:
71:
59:
47:
42:
685:. Extensive photometric observations by the two
1044:
1042:
717:Donaldjohanson is planned to be visited by the
944:
942:
940:
874:
872:
870:
868:
866:
697:According to the survey carried out by NASA's
1420:
1365:
1000:
998:
609:once every 3 years and 8 months (1,345 days;
8:
806:
804:
802:
800:
798:
796:
794:
605:asteroid belt at a distance of 1.9–2.8
21:
1106:
1104:
888:48th Lunar and Planetary Science Conference
1448:
1427:
1413:
1405:
1372:
1358:
1350:
1295:
27:
1717:Minor planets to be visited by spacecraft
1058:
1030:
962:
840:
838:
836:
834:
832:
500:Animation of Lucy's trajectory around Sun
914:
912:
1722:Astronomical objects discovered in 1981
1692:Minor planet object articles (numbered)
1077:10.2458/azu_uapress_9780816532131-ch016
790:
20:
314:Longitude of ascending node
7:
747:. The Lucy probe is named after the
1300:
1210:Asteroid Lightcurve Database (LCDB)
699:Wide-field Infrared Survey Explorer
657:for Erigonian asteroids. It has an
613:of 2.38 AU). Its orbit has an
577:Donaldjohanson is a member of the
14:
812:"52246 Donaldjohanson (1981 EQ5)"
1243:AstDyS-2, Asteroids—Dynamic Site
1227:Dictionary of Minor Planet Names
737:is planned to be visited by the
1111:Noll, Keith (4 December 2020).
457:from the inner regions of the
453:) is a carbonaceous Erigonian
1:
1702:Discoveries by Schelte J. Bus
1011:The Planetary Science Journal
33:Donaldjohanson imaged by the
539: 52246 Donaldjohanson
1712:Slow rotating minor planets
673:with an exceptionally high
326:Argument of perihelion
1738:
981:10.1088/0004-637X/741/2/68
150:Minor planet category
1451:
1436:Small Solar System bodies
1387:
951:The Astrophysical Journal
850:Jet Propulsion Laboratory
755:(born 1943), an American
649:, in-line with the C and
601:It orbits the Sun in the
467:Siding Spring Observatory
432:
265:Orbital period (sidereal)
197:
185:
26:
1219:16 December 2017 at the
924:Small Bodies Data Ferret
848:(2017-01-29 last obs.).
641:Physical characteristics
587:), a large carbonaceous
492:Orbit and classification
484:, the discoverer of the
420:Absolute magnitude
337:Physical characteristics
122:Alternative designations
1381:Minor planets navigator
1292:JPL Small-Body Database
1163:. The Planetary Society
443:provisional designation
366:Synodic rotation period
180:Orbital characteristics
1561:Trans-Neptunian object
1256:Observation prediction
574:
93:(52246) Donaldjohanson
35:Hubble Space Telescope
1235:– Minor Planet Center
1183:"MPC/MPO/MPS Archive"
763:on 25 December 2015 (
749:"Lucy" hominid fossil
499:
486:"Lucy" hominid fossil
199:Uncertainty parameter
1534:Distant minor planet
1393:52246 Donaldjohanson
1287:52246 Donaldjohanson
1239:52246 Donaldjohanson
1053:. pp. 297–321.
701:with its subsequent
625:with respect to the
572: 617 Patroclus
550: 3548 Eurybates
439:52246 Donaldjohanson
87:MPC designation
22:52246 Donaldjohanson
1707:Named minor planets
1343:Physical parameters
1187:Minor Planet Center
1069:2015aste.book..297N
1023:2021PSJ.....2..171L
973:2011ApJ...741...68M
896:2017LPI....48.2025L
816:Minor Planet Center
761:Minor Planet Center
757:paleoanthropologist
693:Diameter and albedo
473:is a target of the
112:paleoanthropologist
72:Discovery date
61:Discovery site
23:
1280:Observational info
1032:10.3847/PSJ/abf840
659:absolute magnitude
575:
469:in Australia. The
189:25 February 2023 (
66:Siding Spring Obs.
49:Discovered by
1697:Erigone asteroids
1679:
1678:
1591:
1590:
1476:Meanings of names
1402:
1401:
780:Discovery program
677:amplitude of 1.7
561: 21900 Orus
436:
435:
270:3.68 yr (1,343 d)
37:on 9 January 2021
1729:
1449:
1429:
1422:
1415:
1406:
1374:
1367:
1360:
1351:
1335:Orbital elements
1299:
1198:
1197:
1195:
1193:
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1108:
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1046:
1037:
1036:
1034:
1002:
993:
992:
966:
946:
935:
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916:
907:
906:
904:
902:
885:
876:
861:
860:
858:
856:
842:
827:
826:
824:
822:
808:
769:
596:163 Erigone
586:
573:
571:
562:
560:
551:
549:
540:
538:
529:
527:
518:
516:
507:
505:
451:
398:
396:
387:Geometric albedo
380:
375:
359:
354:
297:0° 16 4.79 / day
213:14 February 1981
169:
143:
132:
115:
94:
31:
24:
1737:
1736:
1732:
1731:
1730:
1728:
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1675:
1649:
1587:
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1438:
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1403:
1398:
1383:
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1272:Proper elements
1221:Wayback Machine
1206:
1201:
1191:
1189:
1181:
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1004:
1003:
996:
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910:
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898:
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864:
854:
852:
844:
843:
830:
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818:
810:
809:
792:
788:
776:
764:
753:Donald Johanson
745:Jupiter trojans
731:
715:
695:
667:
647:C-type asteroid
643:
635:observation arc
617:of 0.19 and an
611:semi-major axis
589:asteroid family
582:
569:
568:
558:
557:
547:
546:
536:
535:
525:
524:
514:
513:
503:
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494:
482:Donald Johanson
471:C-type asteroid
450:
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389:
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328:
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245:
243:Semi-major axis
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138:
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109:
108:
105:Donald Johanson
101:
92:
89:
38:
17:
12:
11:
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1735:
1733:
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1637:
1635:Near-parabolic
1632:
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1607:
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1599:
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1589:
1588:
1586:
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1583:
1581:Scattered disc
1578:
1573:
1568:
1558:
1553:
1552:
1551:
1549:Neptune trojan
1546:
1538:
1536:
1530:
1529:
1527:
1526:
1524:Spectral types
1521:
1516:
1514:Jupiter trojan
1511:
1506:
1501:
1496:
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1482:
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1479:
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1346:
1345:
1303:Close approach
1284:
1283:
1282:
1236:
1230:
1229:, Google books
1224:
1212:, query form (
1205:
1204:External links
1202:
1200:
1199:
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1126:
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890:(1964): 2025.
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639:
579:Erigone family
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683:binary system
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655:spectral type
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459:asteroid belt
456:
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406:
405:Spectral type
401:
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345:Mean diameter
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36:
30:
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19:
1671:Space debris
1391:
1338:
1330:
1322:
1314:
1306:
1290:
1275:
1267:
1264:Orbital info
1259:
1251:
1242:
1190:. Retrieved
1186:
1177:
1165:. Retrieved
1154:
1144:28 September
1142:. Retrieved
1136:
1129:
1119:28 September
1117:. Retrieved
1051:Asteroids IV
1050:
1014:
1010:
954:
950:
927:. Retrieved
923:
899:. Retrieved
887:
853:. Retrieved
819:. Retrieved
815:
738:
735:minor planet
732:
719:
716:
696:
671:slow rotator
668:
644:
615:eccentricity
600:
576:
564:
553:
542:
531:
528: Earth
520:
509:
475:
445:
438:
437:
421:
277:Mean anomaly
254:Eccentricity
159:
134:
80:Designations
75:2 March 1981
18:
1661:Cosmic dust
1625:Long-period
1615:Halley-type
1571:Kuiper belt
1456:Designation
713:Exploration
619:inclination
593:parent body
463:Schelte Bus
355:0.013
303:Inclination
292:Mean motion
100:Named after
1686:Categories
1666:Meteoroids
1645:Sungrazing
1620:Hyperbolic
1576:Oort cloud
1519:Near-Earth
1060:1502.01628
929:27 October
786:References
722:spacecraft
709:of 0.103.
675:lightcurve
665:Lightcurve
629:. A first
517: Sun
506: Lucy
232:Perihelion
193:2460000.5)
1556:Damocloid
1319:Ephemeris
1311:Discovery
1248:Ephemeris
1095:119280014
1017:(5): 13.
989:118745497
964:1109.4096
957:(2): 20.
679:magnitude
661:of 15.5.
631:precovery
208:precovery
206:Earliest
156:main-belt
54:S. J. Bus
43:Discovery
1640:Periodic
1566:Detached
1486:Asteroid
1217:Archived
1192:28 April
1167:12 April
901:13 April
855:28 April
821:28 April
774:See also
687:TRAPPIST
653:overall
627:ecliptic
455:asteroid
331:213.016°
319:262.809°
248:2.383 AU
236:1.936 AU
219:Aphelion
16:Asteroid
1605:Extinct
1544:Centaur
1289:at the
1065:Bibcode
1019:Bibcode
969:Bibcode
892:Bibcode
703:NEOWISE
478:mission
465:at the
447:1981 EQ
413:
376:1
282:186.269
174:
172:Erigone
139:1998 YF
128:1981 EQ
107:
1597:Comets
1509:Family
1494:Active
1461:Groups
1339:·
1337:
1331:·
1329:
1323:·
1321:
1315:·
1313:
1307:·
1305:
1276:·
1274:
1268:·
1266:
1260:·
1258:
1252:·
1250:
1093:
1083:
987:
766:M.P.C.
729:Naming
707:albedo
570:
565:·
563:
559:
554:·
552:
548:
543:·
541:
537:
532:·
530:
526:
521:·
519:
515:
510:·
508:
504:
307:4.424°
258:0.1876
223:2.830
160:·
135:·
133:
1654:Other
1610:Great
1341:
1333:
1325:
1317:
1309:
1278:
1270:
1262:
1254:
1091:S2CID
1055:arXiv
985:S2CID
959:arXiv
884:(PDF)
768:97569
733:This
603:inner
567:
556:
545:
534:
523:
512:
428:15.69
397:0.019
393:0.103
351:3.895
187:Epoch
166:inner
162:
137:
1630:Lost
1471:Moon
1466:List
1214:info
1194:2018
1169:2017
1146:2021
1121:2021
1081:ISBN
931:2019
903:2017
857:2018
823:2018
740:Lucy
720:Lucy
621:of 4
476:Lucy
210:date
1241:at
1073:doi
1027:doi
977:doi
955:741
770:).
584:406
422:(H)
372:251
1688::
1185:.
1103:^
1089:.
1079:.
1071:.
1063:.
1041:^
1025:.
1013:.
1009:.
997:^
983:.
975:.
967:.
953:.
939:^
922:.
911:^
886:.
865:^
831:^
814:.
793:^
607:AU
488:.
378:hr
357:km
225:AU
191:JD
141:26
1428:e
1421:t
1414:v
1373:e
1366:t
1359:v
1223:)
1196:.
1171:.
1148:.
1123:.
1097:.
1075::
1067::
1057::
1035:.
1029::
1021::
1015:2
991:.
979::
971::
961::
933:.
905:.
894::
859:.
825:.
651:X
623:°
581:(
449:5
441:(
411:C
395:±
374:±
353:±
284:°
201:0
168:)
164:(
130:5
114:)
110:(
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