481:
42:
576:
progenitor, which brought about a mass extinction, as it is only 1/20 to 1/10 the size. However, it is unlikely to come close enough to Earth to impact it, or even become a risk of impact.
1003:
943:
1288:
1268:
345:
573:
964:
996:
936:
818:
442:
122:
70:
335:
320:
989:
540:'s relatively high inclination, although it passes closer to the Sun than the Earth (0.9 AU), it never comes closer than 0.2 AU.
1283:
1120:
529:. The asteroid never approaches Earth closer than 0.2 AU in the foreseeable future, but occasionally makes close approaches to
929:
65:
296:
1278:
1052:
225:
1211:
890:
1037:
848:
533:
of 0.07 AU. It makes one such approach in 2073, at 0.067 AU, and another one in 2103, at 0.094 AU. Due to
1201:
1191:
856:
840:
326:
1273:
1196:
658:
77:
1032:
832:
824:
105:
812:
616:
572:
of approximately 640 meters. If it impacted the Earth would cause significant damage, but not as much as the
1216:
1100:
1012:
868:
377:
353:
214:
201:
193:
704:
1137:
585:
467:
446:
83:
781:
749:
741:
1042:
952:
308:
179:
805:
797:
789:
773:
765:
757:
732:
1110:
514:
383:
236:
561:
518:
480:
462:
285:
557:
553:
395:
898:
1095:
1047:
506:
434:
207:
167:
145:
1221:
367:
160:
882:
874:
1142:
1085:
1070:
914:
549:
510:
502:
438:
387:
187:
153:
863:
41:
1157:
1125:
1090:
522:
266:
247:
906:
1262:
1181:
1080:
1075:
682:
569:
1247:
1020:
458:
259:
139:
654:
1237:
1186:
1147:
274:
1206:
1152:
171:
1242:
1132:
981:
505:
that crosses Earth's orbit. It orbits the Sun at a distance of 0.9–3.6
361:
921:
1062:
565:
526:
430:
17:
1173:
479:
530:
985:
925:
491:, showing its inclination above the plane of the Solar System
441:, first observed on 12 February 1999, by astronomers of the
552:, relatively rare in the asteroid belt but common in the
1230:
1172:
1109:
1061:
1019:
393:
375:
351:
344:
333:
318:
306:
294:
284:
272:
257:
245:
235:
223:
213:
200:
186:
159:
137:
120:
103:
98:
90:
76:
64:
59:
997:
937:
655:"JPL Small-Body Database Browser: (1999 CW8)"
509:once every 3 years and 4 months (1,221 days;
8:
611:
609:
607:
605:
603:
601:
29:
568:), the asteroid can be estimated to have a
564:of 0.159 (derived from the B-type asteroid
1025:
1004:
990:
982:
944:
930:
922:
40:
737:NeoDyS-2, Near Earth Objects—Dynamic Site
649:
647:
645:
643:
641:
639:
637:
1289:Astronomical objects discovered in 1999
1269:Minor planet object articles (numbered)
597:
472:). As of 2019, it has not been named.
28:
574:Cretaceous–Paleogene extinction event
297:Longitude of ascending node
7:
443:Lincoln Near Earth Asteroid Research
872:
677:
675:
513:of 2.24 AU). Its orbit has an
25:
449:in New Mexico, United States.
1:
819:space situational awareness
429:, is a bright carbonaceous
309:Argument of perihelion
1305:
422:, provisional designation
140:Minor planet category
1028:
1013:Small Solar System bodies
959:
683:"Asteroid Size Estimator"
659:Jet Propulsion Laboratory
408:
248:Orbital period (sidereal)
178:
166:
39:
1284:B-type asteroids (SMASS)
657:(2019-03-01 last obs.).
560:of 18.6, and an assumed
544:Physical characteristics
476:Orbit and classification
396:Absolute magnitude
346:Physical characteristics
123:Alternative designations
953:Minor planets navigator
869:JPL Small-Body Database
161:Orbital characteristics
1138:Trans-Neptunian object
750:Observation prediction
586:Mars-crossing asteroid
492:
447:Lincoln Laboratory ETS
84:Lincoln Laboratory ETS
1279:Discoveries by LINEAR
705:"MPC/MPO/MPS Archive"
548:It is a carbonaceous
483:
180:Uncertainty parameter
1111:Distant minor planet
525:with respect to the
461:was numbered by the
453:Numbering and naming
106:MPC designation
915:Physical parameters
849:Physical properties
709:Minor Planet Center
621:Minor Planet Center
617:"(523972) 1999 CW8"
463:Minor Planet Center
91:Discovery date
78:Discovery site
46:Orbital diagram of
36:
782:Observational info
685:. CNEOS – NASA/JPL
558:absolute magnitude
554:inner Solar System
493:
433:and sub-kilometer
66:Discovered by
1256:
1255:
1168:
1167:
1053:Meanings of names
979:
978:
864:(523972) 1999 CW8
813:(523972) 1999 CW8
733:(523972) 1999 CW8
435:near-Earth object
412:
411:
280:0° 17 41.64 / day
253:3.34 yr (1,221 d)
16:(Redirected from
1296:
1274:Apollo asteroids
1026:
1006:
999:
992:
983:
970:
966:(523972) 1999 CW
946:
939:
932:
923:
907:Orbital elements
790:Close approaches
720:
719:
717:
715:
701:
695:
694:
692:
690:
679:
670:
669:
667:
665:
651:
632:
631:
629:
627:
613:
539:
500:
490:
471:
465:on 18 May 2019 (
428:
420:
416:(523972) 1999 CW
371:
364:
133:
116:
112:(523972) 1999 CW
94:12 February 1999
86:
53:
44:
37:
35:
31:(523972) 1999 CW
21:
1304:
1303:
1299:
1298:
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1295:
1294:
1293:
1259:
1258:
1257:
1252:
1226:
1164:
1105:
1057:
1015:
1010:
980:
975:
969:
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955:
950:
806:Orbit animation
774:Proper elements
729:
724:
723:
713:
711:
703:
702:
698:
688:
686:
681:
680:
673:
663:
661:
653:
652:
635:
625:
623:
615:
614:
599:
594:
582:
550:B-type asteroid
546:
538:
534:
517:of 0.60 and an
511:semi-major axis
503:Apollo asteroid
499:
495:
489:
485:
478:
466:
455:
427:
423:
419:
415:
401:
380:
365:
359:
356:
311:
299:
277:
262:
250:
228:
226:Semi-major axis
188:Observation arc
170:27 April 2019 (
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132:
128:
125:
115:
111:
108:
82:
55:
52:
48:
34:
30:
23:
22:
15:
12:
11:
5:
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1291:
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1261:
1260:
1254:
1253:
1251:
1250:
1245:
1240:
1234:
1232:
1228:
1227:
1225:
1224:
1219:
1214:
1212:Near-parabolic
1209:
1204:
1199:
1194:
1189:
1184:
1178:
1176:
1170:
1169:
1166:
1165:
1163:
1162:
1161:
1160:
1158:Scattered disc
1155:
1150:
1145:
1135:
1130:
1129:
1128:
1126:Neptune trojan
1123:
1115:
1113:
1107:
1106:
1104:
1103:
1101:Spectral types
1098:
1093:
1091:Jupiter trojan
1088:
1083:
1078:
1073:
1067:
1065:
1059:
1058:
1056:
1055:
1050:
1045:
1040:
1035:
1029:
1023:
1017:
1016:
1011:
1009:
1008:
1001:
994:
986:
977:
976:
974:
973:
967:
960:
957:
956:
951:
949:
948:
941:
934:
926:
920:
919:
918:
917:
875:Close approach
861:
860:
859:
810:
809:
808:
728:
727:External links
725:
722:
721:
696:
671:
633:
596:
595:
593:
590:
589:
588:
581:
578:
556:. Based on an
545:
542:
536:
497:
487:
477:
474:
454:
451:
425:
417:
410:
409:
406:
405:
402:
394:
391:
390:
381:
376:
373:
372:
357:
352:
349:
348:
342:
341:
338:
331:
330:
325:0.23 AU (90.2
323:
316:
315:
312:
307:
304:
303:
300:
295:
292:
291:
288:
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281:
278:
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109:
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96:
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32:
24:
14:
13:
10:
9:
6:
4:
3:
2:
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1239:
1236:
1235:
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1229:
1223:
1220:
1218:
1215:
1213:
1210:
1208:
1205:
1203:
1200:
1198:
1195:
1193:
1190:
1188:
1185:
1183:
1180:
1179:
1177:
1175:
1171:
1159:
1156:
1154:
1151:
1149:
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1141:
1140:
1139:
1136:
1134:
1131:
1127:
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1119:
1118:
1117:
1116:
1114:
1112:
1108:
1102:
1099:
1097:
1094:
1092:
1089:
1087:
1084:
1082:
1081:Asteroid belt
1079:
1077:
1076:Aten asteroid
1074:
1072:
1069:
1068:
1066:
1064:
1060:
1054:
1051:
1049:
1046:
1044:
1041:
1039:
1036:
1034:
1031:
1030:
1027:
1024:
1022:
1021:Minor planets
1018:
1014:
1007:
1002:
1000:
995:
993:
988:
987:
984:
972:
971:
962:
961:
958:
954:
947:
942:
940:
935:
933:
928:
927:
924:
916:
912:
908:
904:
900:
899:Orbit diagram
896:
892:
888:
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880:
876:
873:
871:
870:
865:
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850:
846:
842:
838:
834:
830:
826:
823:
822:
821:
820:
814:
811:
807:
803:
799:
798:Physical info
795:
791:
787:
783:
779:
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771:
767:
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759:
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751:
747:
743:
740:
739:
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734:
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684:
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642:
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622:
618:
612:
610:
608:
606:
604:
602:
598:
591:
587:
584:
583:
579:
577:
575:
571:
570:mean diameter
567:
563:
559:
555:
551:
543:
541:
532:
528:
524:
520:
516:
512:
508:
504:
484:The orbit of
482:
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473:
469:
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460:
452:
450:
448:
444:
440:
436:
432:
421:
407:
403:
400:
399:
392:
389:
385:
382:
379:
378:Spectral type
374:
369:
363:
358:
355:
354:Mean diameter
350:
347:
343:
339:
337:
332:
328:
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322:
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310:
305:
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136:
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119:
110:
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102:
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93:
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85:
81:
79:
75:
72:
69:
67:
63:
58:
54:
43:
38:
27:
19:
1248:Space debris
963:
910:
902:
894:
886:
878:
867:
852:
844:
836:
833:Observations
828:
816:
801:
793:
785:
777:
769:
761:
758:Orbital info
753:
745:
736:
712:. Retrieved
708:
699:
687:. Retrieved
662:. Retrieved
624:. Retrieved
620:
547:
515:eccentricity
494:
459:minor planet
456:
439:Apollo group
414:
413:
397:
260:Mean anomaly
237:Eccentricity
149:
99:Designations
47:
26:
1238:Cosmic dust
1202:Long-period
1192:Halley-type
1148:Kuiper belt
1033:Designation
825:Ephemerides
742:Ephemerides
519:inclination
445:program at
319:Earth
286:Inclination
275:Mean motion
1263:Categories
1243:Meteoroids
1222:Sungrazing
1197:Hyperbolic
1153:Oort cloud
1096:Near-Earth
689:16 October
592:References
360:0.64
334:Mars
215:Perihelion
174:2458600.5)
1133:Damocloid
891:Ephemeris
883:Discovery
231:2.2355 AU
219:0.8954 AU
196:(7,322 d)
60:Discovery
1217:Periodic
1143:Detached
1063:Asteroid
580:See also
566:2 Pallas
527:ecliptic
431:asteroid
366:(est at
340:0.074 AU
202:Aphelion
18:1999 CW8
1182:Extinct
1121:Centaur
866:at the
857:Summary
535:1999 CW
496:1999 CW
486:1999 CW
437:of the
424:1999 CW
314:262.11°
302:317.00°
290:33.645°
206:3.5757
129:1999 CW
49:1999 CW
1174:Comets
1086:Family
1071:Active
1038:Groups
911:·
909:
903:·
901:
895:·
893:
887:·
885:
879:·
877:
853:·
851:
845:·
843:
837:·
835:
829:·
827:
802:·
800:
794:·
792:
786:·
784:
778:·
776:
770:·
768:
762:·
760:
754:·
752:
746:·
744:
714:29 May
664:29 May
626:29 May
562:albedo
501:is an
470:114615
468:M.P.C.
265:353.67
241:0.5995
192:20.05
154:Apollo
150:·
148:
71:LINEAR
1231:Other
1187:Great
913:
905:
897:
889:
881:
855:
847:
841:Orbit
839:
831:
804:
796:
788:
780:
772:
764:
756:
748:
521:of 34
457:This
384:SMASS
368:0.159
168:Epoch
152:
1207:Lost
1048:Moon
1043:List
817:ESA–
766:MOID
716:2019
691:2017
666:2019
628:2019
531:Mars
404:18.6
336:MOID
321:MOID
815:at
735:at
398:(H)
146:NEO
1265::
707:.
674:^
636:^
619:.
600:^
507:AU
386:=
362:km
327:LD
208:AU
194:yr
172:JD
1005:e
998:t
991:v
968:8
945:e
938:t
931:v
718:.
693:.
668:.
630:.
537:8
523:°
498:8
488:8
426:8
418:8
388:B
370:)
329:)
267:°
182:0
131:8
114:8
51:8
33:8
20:)
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