1468:
34:
693:
697:
696:
698:
695:
1076:
Hicks, M. D.; Weissman, P. R.; Rabinowitz, D. L.; Chamberlin, A. B.; Buratti, B. J.; Lee, C. O. (September 1998). "Close
Encounters: Observations of the Earth-crossing Asteroids 1998 KY26 and 1998 ML14".
1542:
1837:
1812:
517:
The object's orbit is well known, since it was recovered in 2002 by the
Hawaiian Observatory, and it was most recently observed, from 10 till 15 December 2020, by the
1832:
694:
570:
As a result, it is one of the most easily accessible objects in the Solar System, and its orbit frequently brings it on a path very similar to the optimum
318:
1289:
1218:
823:
will be the first visit of a rapidly rotating micro-asteroid. This will also make 1998 KY26 the smallest object to ever be studied by a spacecraft.
1535:
1412:
560:
491:
1827:
1316:
1817:
304:
1528:
1023:
Ostro, Steven J.; Pravec, Petr; Benner, Lance A. M.; Hudson, R. Scott; Sarounová, Lenka; Hicks, Michael D.; et al. (June 1999).
1822:
1659:
56:
834:
280:
1591:
942:
503:
205:
79:
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content, makes it an attractive target for further study and a potential source of water for future missions to Mars.
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310:
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74:
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216:
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33:
441:
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611:
540:
483:
187:
151:
129:
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662:
372:
144:
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object. It was the first such object to be discovered, but since 1998, several other small
1681:
1624:
1609:
1513:
654:
640:
603:
595:
563:
of approximately 0.0025 AU (374,000 km; 232,000 mi), corresponding to 0.98
495:
487:
397:
171:
137:
1457:
1160:
506:
during 6 days during which it passed 800,000 kilometers (half a million miles) away from
1120:
1090:
1043:
835:"Recovery of 1998 KY26: Implications for Detecting the Yarkovsky Effect (abstract only)"
1696:
1664:
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1467:
615:
552:
250:
227:
1505:
1801:
1720:
1619:
1614:
1134:
846:
791:
658:
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1559:
723:
243:
123:
1260:
1219:"Hayabusa2's Mission isn't Over. It has a New Asteroid Target to Visit: 1998 KY26"
953:
1051:
590:
The physical properties of this object were measured by an international team of
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1725:
1686:
889:
666:
647:
425:
413:
401:
258:
66:
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of any known Solar System object at the time; most asteroids with established
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499:
155:
61:
1781:
1671:
1520:
786:
709:
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have been found to also have short rotation periods, some even faster than
643:. Optical and radar observations indicate that it is a water-rich object.
1601:
674:
670:
556:
479:
623:
490:. It measures approximately 30 meters (100 feet) in diameter and is a
665:
have periods measured in hours. As a result, it cannot possibly be a
657:
of only 10.7 minutes, which was considered to be one of the shortest
619:
475:
498:
of only 10.7 minutes. It was first observed on 2 June 1998, by the
1712:
737:
691:
579:
571:
507:
334:
1195:
781:
575:
511:
361:
1524:
1317:
Sun never sets, for long, on fast-spinning, water-rich asteroid
751:
669:, as many asteroids are thought to be, and must instead be a
1025:"Radar and Optical Observations of Asteroid 1998 KY26"
1266:
Scott Hudson's
Homepage: The Earth-Crossing Asteroid
1107:
Pravec, P.; Sarounova, L. (June 1998). "1998 KY26".
1769:
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1648:
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104:
99:
85:
73:
55:
50:
1192:"Astronomy Picture of the Day: Asteroid 1998 KY26"
952:. SPACEWATCH Project. 7 April 2004. Archived from
543:once every 16 months (500 days). Its orbit has an
892:(2020-12-12 last obs.). Jet Propulsion Laboratory
702:Animation of Hayabusa2 orbit - Extended mission
909:
907:
890:"JPL Small-Body Database Browser: (1998 KY26)"
1536:
1102:
1100:
839:Bulletin of the American Astronomical Society
539:orbits the Sun at a distance of 1.0–1.5
8:
1071:
1069:
1018:
1016:
1014:
1012:
1010:
1008:
1006:
1004:
1002:
937:
935:
578:transfer orbit. This, coupled with its high
21:
780:In September 2020, a mission extension for
639:is characterized as a potentially metallic
1564:
1543:
1529:
1521:
1466:
653:in 1998, the object is measured to have a
32:
1838:Minor planets to be visited by spacecraft
1813:Minor planet object articles (unnumbered)
1331:NeoDyS-2, Near Earth Objects—Dynamic Site
884:
882:
880:
878:
876:
874:
872:
45:, derived from radar observations in 1998
1833:Astronomical objects discovered in 1998
1319:(press release). Pasadena, California:
1186:
1184:
1141:. Minor Planet Center. 15 December 2020
868:
979:
977:
975:
973:
971:
20:
987:. Asteroid Lightcurve Database (LCDB)
561:minimum orbital intersection distance
281:Longitude of ascending node
7:
794:probe was selected to do additional
510:(a little more than twice the Earth–
1471:
809:in July 2026 and a rendezvous with
38:Three views of a computer model of
816:in July 2031. The rendezvous with
14:
1217:Gough, Evan (25 September 2020).
1135:"MPEC 2020-X181 : 1998 KY26"
1139:Minor Planet Electronic Circular
833:Tholen, D. J. (September 2003).
93:(discovery: first observed only)
1038:(5427): 557–559(SciHomepage).
504:Kitt Peak National Observatory
1:
1079:American Astronomical Society
798:of two near-Earth asteroids:
309:0.002531 AU (0.985
1052:10.1126/science.285.5427.557
521:. La Palma Observatory, and
1828:Fast rotating minor planets
1413:space situational awareness
985:"LCDB Data for (1998 KY26)"
293:Argument of perihelion
1854:
1818:Discoveries by Tom Gehrels
124:Minor planet category
1567:
1552:Small Solar System bodies
1321:Jet Propulsion Laboratory
1277:Steven Ostro's Homepage:
943:"Spacewatch discovery of
600:Jet Propulsion Laboratory
460:
228:Orbital period (sidereal)
162:
150:
31:
1823:Earth-crossing asteroids
1315:Media Relations Office.
529:Orbit and classification
442:Absolute magnitude
319:Physical characteristics
1463:JPL Small-Body Database
523:Mauna Kea observatories
354:Synodic rotation period
145:Orbital characteristics
1677:Trans-Neptunian object
1344:Observation prediction
777:
701:
176:22.54 yr (8,231 days)
164:Uncertainty parameter
1650:Distant minor planet
555:with respect to the
339:(effective diameter)
107:MPC designation
1514:Physical parameters
1443:Physical properties
1288:Lipanović, Željko.
1198:. 19 September 2002
1121:1998IAUC.6941....2P
1091:1998DPS....30.1006H
1044:1999Sci...285..557O
919:Minor Planet Center
849:on 14 February 2012
845:(4). Archived from
596:Dr. Steven J. Ostro
586:Physical properties
86:Discovery date
75:Discovery site
28:
16:Near-Earth asteroid
1376:Observational info
1303:on 22 October 2009
778:
612:optical telescopes
559:. It has an Earth
482:, classified as a
264:0° 43 11.781 / day
57:Discovered by
1795:
1794:
1707:
1706:
1592:Meanings of names
699:
496:rotational period
484:near-Earth object
464:
463:
1845:
1808:Apollo asteroids
1565:
1545:
1538:
1531:
1522:
1506:Orbital elements
1470:
1384:Close approaches
1312:
1310:
1308:
1299:. Archived from
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663:rotational rates
638:
538:
472:
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373:Geometric albedo
364:
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117:
95:
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44:
36:
29:
27:
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1703:
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1596:
1554:
1549:
1400:Orbit animation
1368:Proper elements
1323:. 22 July 1999.
1306:
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832:
829:
827:Further reading
821:
817:
814:
810:
803:
802:
801:(98943) 2001 CC
799:
775: 1998 KY26
772:
771:
764: 2001 CC21
761:
760:
747:
746:
733:
732:
719:
718:
705:
704:
703:
692:
690:
682:
678:
655:rotation period
641:X-type asteroid
637:
633:
604:radar telescope
588:
565:lunar distances
547:of 0.20 and an
537:
533:
531:
471:
467:
452:
450:
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359:
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329:
295:
283:
261:
246:
230:
208:
206:Semi-major axis
172:Observation arc
126:
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112:
109:
92:
91:
90:
64:
46:
43:
39:
26:
22:
17:
12:
11:
5:
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1751:Near-parabolic
1748:
1743:
1738:
1733:
1728:
1723:
1717:
1715:
1709:
1708:
1705:
1704:
1702:
1701:
1700:
1699:
1697:Scattered disc
1694:
1689:
1684:
1674:
1669:
1668:
1667:
1665:Neptune trojan
1662:
1654:
1652:
1646:
1645:
1643:
1642:
1640:Spectral types
1637:
1632:
1630:Jupiter trojan
1627:
1622:
1617:
1612:
1606:
1604:
1598:
1597:
1595:
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1584:
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1555:
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1548:
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1525:
1519:
1518:
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1516:
1474:Close approach
1455:
1454:
1453:
1404:
1403:
1402:
1324:
1313:
1293:
1285:
1280:
1274:
1269:
1263:
1256:
1255:External links
1253:
1250:
1249:
1235:
1223:Universe Today
1209:
1180:
1164:
1152:
1126:
1096:
1065:
998:
967:
956:on 1 July 2010
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819:
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689:
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616:Czech Republic
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478:sub-kilometer
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80:Kitt Peak Obs.
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1623:
1621:
1620:Asteroid belt
1618:
1616:
1615:Aten asteroid
1613:
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1608:
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1560:Minor planets
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1498:Orbit diagram
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1397:
1393:
1392:Physical info
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1298:
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1264:
1262:
1261:MPEC 1998-L02
1259:
1258:
1254:
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1239:
1236:
1224:
1220:
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1193:
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836:
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826:
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807:
797:
793:
792:sample return
789:
788:
783:
769:
758:
753:
744:
739:
730:
725:
716:
711:
687:
685:
676:
672:
668:
664:
660:
659:sidereal days
656:
652:
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519:Cerro Paranal
515:
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501:
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489:
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481:
477:
473:
459:
449:
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392:Spectral type
388:
377:
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358:
355:
350:
336:
331:
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327:Mean diameter
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237:(500.04 days)
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154:31 May 2020 (
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19:
1787:Space debris
1509:
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1438:
1430:
1427:Observations
1422:
1410:
1395:
1387:
1379:
1371:
1363:
1355:
1352:Orbital info
1347:
1339:
1330:
1320:
1305:. Retrieved
1301:the original
1238:
1226:. Retrieved
1222:
1212:
1200:. Retrieved
1171:. Retrieved
1155:
1143:. Retrieved
1138:
1129:
1112:
1108:
1082:
1078:
1035:
1031:
989:. Retrieved
958:. Retrieved
954:the original
922:. Retrieved
918:
894:. Retrieved
851:. Retrieved
847:the original
842:
838:
785:
779:
767:
756:
742:
728:
724:162173 Ryugu
714:
645:
632:
589:
569:
545:eccentricity
532:
516:
492:fast rotator
488:Apollo group
474:is a nearly
466:
465:
443:
360:0.1782
343:20–40 m
244:Mean anomaly
217:Eccentricity
133:
100:Designations
18:
1777:Cosmic dust
1741:Long-period
1731:Halley-type
1687:Kuiper belt
1572:Designation
1419:Ephemerides
1336:Ephemerides
1244:"1998 Ky26"
1145:16 December
1115:(6941): 2.
915:"1998 KY26"
688:Exploration
667:rubble pile
648:light curve
592:astronomers
549:inclination
514:distance).
494:, having a
303:Earth
270:Inclination
259:Mean motion
89:28 May 1998
67:Tom Gehrels
1802:Categories
1782:Meteoroids
1761:Sungrazing
1736:Hyperbolic
1692:Oort cloud
1635:Near-Earth
863:References
671:monolithic
651:photometry
628:California
608:California
502:survey at
500:Spacewatch
195:Perihelion
158:2459000.5)
62:Spacewatch
1672:Damocloid
1490:Ephemeris
1482:Discovery
1458:1998 KY26
1407:1998 KY26
1327:1998 KY26
1228:1 October
790:asteroid
787:Hayabusa2
710:Hayabusa2
675:asteroids
476:spherical
384:(derived)
211:1.2329 AU
199:0.9840 AU
51:Discovery
1756:Periodic
1682:Detached
1602:Asteroid
1307:25 April
1202:1 August
1173:25 April
1109:IAU Circ
1085:: 1029.
1060:10417379
991:1 August
960:1 August
924:1 August
896:1 August
853:25 April
602:using a
557:ecliptic
480:asteroid
366:0.1784 h
333:30
298:209.378°
182:Aphelion
1721:Extinct
1660:Centaur
1460:at the
1451:Summary
1297:Images"
1292:1998 KY
1279:1998 KY
1268:1998 KY
1163:1998 KY
1117:Bibcode
1087:Bibcode
1040:Bibcode
1032:Science
945:1998 KY
818:1998 KY
811:1998 KY
679:1998 KY
634:1998 KY
624:Arizona
614:in the
598:of the
594:led by
534:1998 KY
486:of the
468:1998 KY
346:(range)
286:84.366°
274:1.4810°
249:359.504
221:0.20192
186:1.4819
113:1998 KY
40:1998 KY
23:1998 KY
1713:Comets
1625:Family
1610:Active
1577:Groups
1510:·
1508:
1502:·
1500:
1494:·
1492:
1486:·
1484:
1478:·
1476:
1447:·
1445:
1439:·
1437:
1431:·
1429:
1423:·
1421:
1396:·
1394:
1388:·
1386:
1380:·
1378:
1372:·
1370:
1364:·
1362:
1356:·
1354:
1348:·
1346:
1340:·
1338:
1058:
796:flybys
773:
768:·
766:
762:
757:·
755:
750:
748:
743:·
741:
736:
734:
729:·
727:
722:
720:
715:·
713:
708:
706:
620:Hawaii
382:0.124
138:Apollo
134:·
132:
1770:Other
1726:Great
1512:
1504:
1496:
1488:
1480:
1449:
1441:
1435:Orbit
1433:
1425:
1398:
1390:
1382:
1374:
1366:
1358:
1350:
1342:
1028:(PDF)
770:
759:
745:
738:Earth
731:
717:
646:From
580:water
572:Earth
508:Earth
434:0.053
430:0.088
422:0.055
418:0.058
410:0.070
406:0.083
233:1.37
152:Epoch
136:
1746:Lost
1587:Moon
1582:List
1411:ESA–
1360:MOID
1309:2009
1230:2020
1204:2017
1196:NASA
1175:2009
1147:2020
1113:6941
1056:PMID
993:2017
962:2017
926:2017
898:2017
855:2009
782:JAXA
626:and
610:and
576:Mars
551:of 1
512:Moon
451:25.5
379:0.12
305:MOID
1409:at
1329:at
1048:doi
1036:285
784:'s
752:Sun
606:in
455:0.3
444:(H)
426:R–I
414:V–R
402:B–R
130:NEO
1804::
1294:26
1281:26
1270:26
1221:.
1194:.
1183:^
1165:26
1137:.
1111:.
1099:^
1083:30
1081:.
1068:^
1054:.
1046:.
1034:.
1030:.
1001:^
970:^
947:26
934:^
917:.
906:^
871:^
843:35
841:.
837:.
820:26
813:26
804:21
684:.
681:26
636:26
630:.
622:,
618:,
567:.
541:AU
536:26
525:.
470:26
311:LD
235:yr
188:AU
156:JD
115:26
42:26
25:26
1544:e
1537:t
1530:v
1311:.
1290:"
1246:.
1232:.
1206:.
1177:.
1168:"
1161:"
1149:.
1123:.
1119::
1093:.
1089::
1062:.
1050::
1042::
995:.
964:.
950:"
928:.
900:.
857:.
574:–
553:°
453:±
432:±
428:=
420:±
416:=
408:±
404:=
398:X
362:h
335:m
313:)
251:°
166:0
69:)
65:(
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