1424:
844:, observed on 4 March 2005, gave a best-fit ellipse dimension of 28.0×28.0 kilometers. These timed observations are taken when the asteroid passes in front of a distant star. However the quality of the measurement is rated poorly.
1136:
Masiero, Joseph R.; Grav, T.; Mainzer, A. K.; Nugent, C. R.; Bauer, J. M.; Stevenson, R.; et al. (August 2014). "Main-belt
Asteroids with WISE/NEOWISE: Near-infrared Albedos".
1563:
1498:
1848:
1828:
599:
431:
304:
1838:
1556:
1491:
924:
465:
92:
1081:
Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011).
725:
1549:
1524:
1680:
1484:
32:
281:
1264:"Eleven Main-belt Asteroids and One Near-Earth Asteroid Lightcurves at Asteroids Observers (OBAS) - MPPD: 2017 May - 2019 Jan"
1612:
523:
210:
1114:
1833:
1771:
1843:
1445:
1185:
1597:
1761:
1751:
1039:
1008:
1756:
951:
44:
1592:
70:
586:
learned about the meaning of the asteroid's name from private communications with long-time Simeiz astronomer
503:
of 7.9 hours and is likely spherical in shape. It was named after Lyka, a friend of the discoverer's sister.
1776:
1660:
1572:
1418:
527:
420:
357:
312:
199:
186:
178:
1697:
1307:
627:
1602:
1507:
1184:
Lazzaro, D.; Angeli, C. A.; Carvano, J. M.; Mothé-Diniz, T.; Duffard, R.; Florczak, M. (November 2004).
869:
650:
293:
164:
1670:
1278:
1200:
1155:
1094:
1051:
841:
543:
221:
1406:
1382:
1374:
1359:
757:
547:
519:
480:
270:
138:
1398:
1390:
1365:
975:
1241:
1145:
789:
660:
492:
441:
49:
1453:
562:
begins at Simeiz on 1 September 1926, eleven years after to its official discovery observation.
1655:
1607:
1286:
920:
908:
717:
700:
655:
535:
192:
152:
1781:
1437:
1429:
1208:
1163:
1102:
912:
900:
587:
378:
145:
1469:
1702:
1645:
1630:
1413:
631:
607:
575:
559:
539:
515:
500:
496:
488:
426:
172:
37:
483:, approximately 32 kilometers (20 miles) in diameter, located in the inner region of the
1340:
1282:
1204:
1159:
1098:
1055:
1717:
1685:
1650:
1461:
1423:
1237:
551:
251:
232:
1331:
1263:
1167:
1822:
1741:
1640:
1635:
1354:
901:
579:
484:
1807:
1580:
571:
531:
244:
132:
116:
916:
1212:
947:
1797:
1746:
1707:
1518:
1346:
259:
1118:
1766:
1712:
619:
156:
1290:
1262:
Carreño, Alfonso; Arce, Enrique; Fornas, Gonzalo; Mas, Vicente (April 2019).
1107:
1082:
1802:
1692:
1541:
327:
122:
712:
According to the survey carried out by the
Infrared Astronomical Satellite
1476:
1622:
1530:
630:
observations by
Matthieu Conjat. Lightcurve analysis gave a well-defined
555:
788:
derives an albedo of 0.0520 and a diameter of 27.89 km based on an
721:
1083:"Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey"
1038:
Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004).
792:
of 11.6. Further published mean-diameters by the WISE team include (
1733:
1150:
713:
670:
369:
1545:
1480:
487:. It was discovered on 5 September 1915, by Russian astronomer
574:
was named after Lyka, a friend of the sister of discoverer
1360:
1186:"S3OS2: the visible spectroscopic survey of 820 asteroids"
948:"JPL Small-Body Database Browser: 917 Lyka (A915 RR)"
1790:
1732:
1669:
1621:
1579:
1238:"Asteroids and comets rotation curves – (917) Lyka"
598:In both the Tholen- and SMASS-like taxonomy of the
439:
418:
376:
355:
310:
303:
291:
279:
269:
257:
242:
230:
220:
208:
198:
185:
171:
144:
114:
90:
80:
68:
63:
55:
43:
31:
26:
1087:Publications of the Astronomical Society of Japan
756:) kilometers in diameter and its surface has an
659:). In October 2018, the period was confirmed by
970:
968:
600:Small Solar System Objects Spectroscopic Survey
1179:
1177:
1131:
1129:
1127:
1557:
1492:
1231:
1229:
538:once every 3 years and 8 months (1,342 days;
8:
864:
862:
860:
858:
856:
21:
1585:
1564:
1550:
1542:
1499:
1485:
1477:
1422:
894:
892:
890:
653:, indicative of a rather spherical shape (
1347:Asteroids and comets rotation curves, CdR
1149:
1106:
942:
940:
938:
936:
642:hours with a low brightness variation of
86:Lyka, a friend of the discoverer's sister
1003:
1001:
999:
997:
995:
993:
899:Schmadel, Lutz D. (2007). "(917) Lyka".
534:main-belt at a distance of 1.9–2.9
1849:Astronomical objects discovered in 1915
1829:Minor planet object articles (numbered)
1302:
1300:
1076:
1074:
1072:
1033:
1031:
1029:
852:
907:. Springer Berlin Heidelberg. p.
786:Collaborative Asteroid Lightcurve Link
20:
1310:. Asteroid Lightcurve Database (LCDB)
976:"Asteroid 917 Lyka – Proper Elements"
282:Longitude of ascending node
7:
978:. AstDyS-2, Asteroids – Dynamic Site
1427:
542:of 2.38 AU). Its orbit has an
674:) and by Alfonso Carreño of OBAS (
14:
1370:AstDyS-2, Asteroids—Dynamic Site
1341:Dictionary of Minor Planet Names
903:Dictionary of Minor Planet Names
584:Dictionary of Minor Planet Names
1040:"IRAS Minor Planet Survey V6.0"
1839:Discoveries by Grigory Neujmin
1050:: IRAS-A-FPA-3-RDR-IMPS-V6.0.
618:In January 2005, a rotational
524:hierarchical clustering method
495:on the Crimean peninsula. The
1:
917:10.1007/978-3-540-29925-7_918
1213:10.1016/j.icarus.2004.06.006
518:asteroid of the main belt's
1168:10.1088/0004-637X/791/2/121
530:. It orbits the Sun in the
294:Argument of perihelion
1865:
1308:"LCDB Data for (917) Lyka"
1044:NASA Planetary Data System
117:Minor planet category
1588:
1573:Small Solar System bodies
1514:
1332:Lightcurve Database Query
1138:The Astrophysical Journal
952:Jet Propulsion Laboratory
454:
233:Orbital period (sidereal)
163:
151:
1013:Small Bodies Data Ferret
950:(2020-02-05 last obs.).
824:) with albedos between (
594:Physical characteristics
507:Orbit and classification
442:Absolute magnitude
305:Physical characteristics
93:Alternative designations
1508:Minor planets navigator
1419:JPL Small-Body Database
528:proper orbital elements
358:Synodic rotation period
146:Orbital characteristics
1698:Trans-Neptunian object
1383:Observation prediction
1108:10.1093/pasj/63.5.1117
1362:– Minor Planet Center
1271:Minor Planet Bulletin
784:), respectively. The
682:) with amplitudes of
520:background population
165:Uncertainty parameter
1834:Background asteroids
1671:Distant minor planet
1336:www.minorplanet.info
870:"917 Lyka (A915 RR)"
842:asteroid occultation
582:, the author of the
554:with respect to the
71:MPC designation
1844:Named minor planets
1470:Physical parameters
1283:2019MPBu...46..200C
1205:2004Icar..172..179L
1160:2014ApJ...791..121M
1119:AcuA catalog p. 153
1099:2011PASJ...63.1117U
1056:2004PDSS...12.....T
1009:"Asteroid 917 Lyka"
874:Minor Planet Center
708:Diameter and albedo
481:background asteroid
56:Discovery date
45:Discovery site
23:
16:Background asteroid
1407:Observational info
1351:Geneva Observatory
1242:Geneva Observatory
790:absolute magnitude
728:telescope (WISE),
724:mission of NASA's
661:Laurent Bernasconi
626:was obtained from
522:when applying the
493:Simeiz Observatory
33:Discovered by
1816:
1815:
1728:
1727:
1613:Meanings of names
1539:
1538:
926:978-3-540-00238-3
466:prov. designation
458:
457:
238:3.67 yr (1,342 d)
1856:
1586:
1566:
1559:
1552:
1543:
1501:
1494:
1487:
1478:
1462:Orbital elements
1426:
1320:
1319:
1317:
1315:
1304:
1295:
1294:
1268:
1259:
1253:
1252:
1250:
1248:
1236:Behrend, Raoul.
1233:
1224:
1223:
1221:
1219:
1190:
1181:
1172:
1171:
1153:
1133:
1122:
1112:
1110:
1093:(5): 1117–1138.
1078:
1067:
1066:
1064:
1062:
1035:
1024:
1023:
1021:
1019:
1005:
988:
987:
985:
983:
972:
963:
962:
960:
958:
944:
931:
930:
906:
896:
885:
884:
882:
880:
866:
839:
837:
831:
829:
823:
821:
815:
813:
807:
805:
799:
797:
783:
781:
775:
773:
767:
765:
755:
753:
747:
745:
739:
737:
703:
698:, respectively (
697:
695:
689:
687:
681:
679:
673:
668:
658:
649:
647:
641:
639:
588:Nikolai Chernykh
478:
472:
435:
411:
409:
402:
400:
393:
391:
379:Geometric albedo
372:
367:
348:
346:
339:
337:
330:
325:
265:0° 16 5.52 / day
136:
59:5 September 1915
24:
1864:
1863:
1859:
1858:
1857:
1855:
1854:
1853:
1819:
1818:
1817:
1812:
1786:
1724:
1665:
1617:
1575:
1570:
1540:
1535:
1510:
1505:
1399:Proper elements
1328:
1323:
1313:
1311:
1306:
1305:
1298:
1266:
1261:
1260:
1256:
1246:
1244:
1235:
1234:
1227:
1217:
1215:
1188:
1183:
1182:
1175:
1135:
1134:
1125:
1080:
1079:
1070:
1060:
1058:
1037:
1036:
1027:
1017:
1015:
1007:
1006:
991:
981:
979:
974:
973:
966:
956:
954:
946:
945:
934:
927:
898:
897:
888:
878:
876:
868:
867:
854:
850:
835:
833:
827:
825:
819:
817:
811:
809:
803:
801:
795:
793:
779:
777:
771:
769:
763:
761:
751:
749:
743:
741:
735:
733:
718:Akari satellite
716:, the Japanese
710:
699:
693:
691:
685:
683:
677:
675:
666:
664:
654:
645:
643:
637:
635:
632:rotation period
616:
614:Rotation period
608:X-type asteroid
596:
576:Grigory Neujmin
568:
560:observation arc
546:of 0.20 and an
540:semi-major axis
509:
501:rotation period
497:X-type asteroid
489:Grigory Neujmin
476:
470:
447:
429:
423:
414:
407:
405:
398:
396:
389:
387:
381:
365:
363:
360:
351:
344:
342:
335:
333:
323:
321:
315:
296:
284:
262:
247:
235:
213:
211:Semi-major axis
173:Observation arc
137:
130:
119:
109:
103:
95:
83:
73:
17:
12:
11:
5:
1862:
1860:
1852:
1851:
1846:
1841:
1836:
1831:
1821:
1820:
1814:
1813:
1811:
1810:
1805:
1800:
1794:
1792:
1788:
1787:
1785:
1784:
1779:
1774:
1772:Near-parabolic
1769:
1764:
1759:
1754:
1749:
1744:
1738:
1736:
1730:
1729:
1726:
1725:
1723:
1722:
1721:
1720:
1718:Scattered disc
1715:
1710:
1705:
1695:
1690:
1689:
1688:
1686:Neptune trojan
1683:
1675:
1673:
1667:
1666:
1664:
1663:
1661:Spectral types
1658:
1653:
1651:Jupiter trojan
1648:
1643:
1638:
1633:
1627:
1625:
1619:
1618:
1616:
1615:
1610:
1605:
1600:
1595:
1589:
1583:
1577:
1576:
1571:
1569:
1568:
1561:
1554:
1546:
1537:
1536:
1534:
1533:
1528:
1521:
1515:
1512:
1511:
1506:
1504:
1503:
1496:
1489:
1481:
1475:
1474:
1473:
1472:
1430:Close approach
1411:
1410:
1409:
1363:
1357:
1344:
1343:, Google books
1338:
1327:
1326:External links
1324:
1322:
1321:
1296:
1277:(2): 200–203.
1254:
1225:
1199:(1): 179–220.
1173:
1123:
1068:
1025:
989:
964:
932:
925:
886:
851:
849:
846:
709:
706:
615:
612:
595:
592:
567:
564:
508:
505:
456:
455:
452:
451:
448:
440:
437:
436:
424:
419:
416:
415:
413:
412:
403:
394:
384:
382:
377:
374:
373:
361:
356:
353:
352:
350:
349:
340:
331:
318:
316:
311:
308:
307:
301:
300:
297:
292:
289:
288:
285:
280:
277:
276:
273:
267:
266:
263:
258:
255:
254:
248:
243:
240:
239:
236:
231:
228:
227:
224:
218:
217:
214:
209:
206:
205:
202:
196:
195:
189:
183:
182:
175:
169:
168:
161:
160:
149:
148:
142:
141:
120:
115:
112:
111:
96:
91:
88:
87:
84:
81:
78:
77:
74:
69:
66:
65:
61:
60:
57:
53:
52:
47:
41:
40:
35:
29:
28:
15:
13:
10:
9:
6:
4:
3:
2:
1861:
1850:
1847:
1845:
1842:
1840:
1837:
1835:
1832:
1830:
1827:
1826:
1824:
1809:
1806:
1804:
1801:
1799:
1796:
1795:
1793:
1789:
1783:
1780:
1778:
1775:
1773:
1770:
1768:
1765:
1763:
1760:
1758:
1755:
1753:
1750:
1748:
1745:
1743:
1740:
1739:
1737:
1735:
1731:
1719:
1716:
1714:
1711:
1709:
1706:
1704:
1701:
1700:
1699:
1696:
1694:
1691:
1687:
1684:
1682:
1679:
1678:
1677:
1676:
1674:
1672:
1668:
1662:
1659:
1657:
1654:
1652:
1649:
1647:
1644:
1642:
1641:Asteroid belt
1639:
1637:
1636:Aten asteroid
1634:
1632:
1629:
1628:
1626:
1624:
1620:
1614:
1611:
1609:
1606:
1604:
1601:
1599:
1596:
1594:
1591:
1590:
1587:
1584:
1582:
1581:Minor planets
1578:
1574:
1567:
1562:
1560:
1555:
1553:
1548:
1547:
1544:
1532:
1529:
1527:
1526:
1522:
1520:
1517:
1516:
1513:
1509:
1502:
1497:
1495:
1490:
1488:
1483:
1482:
1479:
1471:
1467:
1463:
1459:
1455:
1454:Orbit diagram
1451:
1447:
1443:
1439:
1435:
1431:
1428:
1425:
1421:
1420:
1415:
1412:
1408:
1404:
1400:
1396:
1392:
1388:
1384:
1380:
1376:
1373:
1372:
1371:
1367:
1364:
1361:
1358:
1356:
1355:Raoul Behrend
1352:
1348:
1345:
1342:
1339:
1337:
1333:
1330:
1329:
1325:
1309:
1303:
1301:
1297:
1292:
1288:
1284:
1280:
1276:
1272:
1265:
1258:
1255:
1243:
1239:
1232:
1230:
1226:
1214:
1210:
1206:
1202:
1198:
1194:
1187:
1180:
1178:
1174:
1169:
1165:
1161:
1157:
1152:
1147:
1143:
1139:
1132:
1130:
1128:
1124:
1120:
1116:
1109:
1104:
1100:
1096:
1092:
1088:
1084:
1077:
1075:
1073:
1069:
1057:
1053:
1049:
1045:
1041:
1034:
1032:
1030:
1026:
1014:
1010:
1004:
1002:
1000:
998:
996:
994:
990:
977:
971:
969:
965:
953:
949:
943:
941:
939:
937:
933:
928:
922:
918:
914:
910:
905:
904:
895:
893:
891:
887:
875:
871:
865:
863:
861:
859:
857:
853:
847:
845:
843:
822:0.227 km
814:2.565 km
791:
787:
759:
731:
727:
723:
719:
715:
707:
705:
702:
672:
662:
657:
652:
633:
629:
625:
621:
613:
611:
609:
605:
601:
593:
591:
589:
585:
581:
580:Lutz Schmadel
577:
573:
565:
563:
561:
558:. The body's
557:
553:
549:
545:
541:
537:
533:
529:
525:
521:
517:
513:
506:
504:
502:
498:
494:
490:
486:
485:asteroid belt
482:
475:
469:
467:
462:
453:
449:
446:
445:
438:
433:
428:
425:
422:
421:Spectral type
417:
404:
395:
386:
385:
383:
380:
375:
371:
362:
359:
354:
347:0.184 km
341:
332:
329:
320:
319:
317:
314:
313:Mean diameter
309:
306:
302:
298:
295:
290:
286:
283:
278:
274:
272:
268:
264:
261:
256:
253:
249:
246:
241:
237:
234:
229:
225:
223:
219:
215:
212:
207:
203:
201:
197:
194:
190:
188:
184:
180:
176:
174:
170:
166:
162:
158:
155:31 May 2020 (
154:
150:
147:
143:
140:
134:
128:
124:
121:
118:
113:
107:
104:1951 JJ
101:
98:A915 RR
97:
94:
89:
85:
79:
75:
72:
67:
62:
58:
54:
51:
48:
46:
42:
39:
36:
34:
30:
25:
19:
1808:Space debris
1523:
1519:916 America
1465:
1457:
1449:
1441:
1433:
1417:
1402:
1394:
1391:Orbital info
1386:
1378:
1369:
1350:
1335:
1312:. Retrieved
1274:
1270:
1257:
1245:. Retrieved
1216:. Retrieved
1196:
1192:
1141:
1137:
1090:
1086:
1059:. Retrieved
1047:
1043:
1016:. Retrieved
1012:
980:. Retrieved
955:. Retrieved
902:
877:. Retrieved
873:
806:9.28 km
798:4.99 km
785:
729:
711:
680:0.007 h
669:0.0003
623:
617:
603:
597:
583:
572:minor planet
569:
544:eccentricity
511:
510:
473:
464:
460:
459:
443:
338:0.49 km
245:Mean anomaly
222:Eccentricity
126:
108: 1915 S4
105:
102: 1950 BS
99:
64:Designations
18:
1798:Cosmic dust
1762:Long-period
1752:Halley-type
1708:Kuiper belt
1593:Designation
1334:(LCDB), at
1314:23 February
1247:23 February
1218:23 February
1061:23 February
1018:23 February
982:23 February
957:23 February
879:23 February
628:photometric
548:inclination
368:0.006
271:Inclination
260:Mean motion
82:Named after
50:Simeiz Obs.
1823:Categories
1803:Meteoroids
1782:Sungrazing
1757:Hyperbolic
1713:Oort cloud
1656:Near-Earth
848:References
732:measures (
720:, and the
620:lightcurve
200:Perihelion
181:(36,591 d)
159:2459000.5)
139:background
76:(917) Lyka
38:G. Neujmin
1693:Damocloid
1446:Ephemeris
1438:Discovery
1375:Ephemeris
1291:1052-8091
1151:1406.6645
1144:(2): 11.
651:magnitude
602:(S3OS2),
514:is a non-
326:3.9
216:2.3812 AU
204:1.9035 AU
123:main-belt
27:Discovery
1777:Periodic
1703:Detached
1623:Asteroid
1531:918 Itha
1525:917 Lyka
1414:917 Lyka
1366:917 Lyka
556:ecliptic
461:917 Lyka
187:Aphelion
22:917 Lyka
1742:Extinct
1681:Centaur
1416:at the
1279:Bibcode
1201:Bibcode
1156:Bibcode
1095:Bibcode
1052:Bibcode
832:) and (
816:) and (
776:) and (
748:) and (
722:NEOWISE
526:to its
491:at the
479:) is a
477:1915 S4
471:A915 RR
299:359.90°
287:343.38°
275:5.1264°
191:2.8590
177:100.18
110:1915 Σ4
1734:Comets
1646:Family
1631:Active
1598:Groups
1466:·
1464:
1458:·
1456:
1450:·
1448:
1442:·
1440:
1434:·
1432:
1403:·
1401:
1395:·
1393:
1387:·
1385:
1379:·
1377:
1289:
1193:Icarus
1115:online
923:
840:). An
818:37.843
810:34.789
762:0.0891
758:albedo
750:34.878
665:7.8838
606:is an
566:Naming
516:family
499:has a
406:0.0891
343:34.878
250:181.91
226:0.2006
127:·
125:
106:·
100:·
1791:Other
1747:Great
1468:
1460:
1452:
1444:
1436:
1405:
1397:
1389:
1381:
1267:(PDF)
1189:(PDF)
1146:arXiv
830:0.009
826:0.026
802:26.65
794:21.60
782:0.008
778:0.056
774:0.003
770:0.072
766:0.031
754:0.184
742:31.29
734:28.10
701:U=3/3
676:7.889
640:0.006
636:7.867
570:This
532:inner
432:S3OS2
410:0.031
401:0.003
397:0.072
392:0.008
388:0.056
364:7.867
334:31.29
322:28.10
153:Epoch
133:inner
129:
1767:Lost
1608:Moon
1603:List
1316:2020
1287:ISSN
1249:2020
1220:2020
1063:2020
1020:2020
984:2020
959:2020
921:ISBN
881:2020
838:0.02
834:0.05
808:), (
800:), (
768:), (
760:of (
746:0.49
740:), (
730:Lyka
726:WISE
714:IRAS
696:0.03
692:0.26
690:and
688:0.01
684:0.12
648:0.02
644:0.17
624:Lyka
604:Lyka
550:of 5
512:Lyka
450:11.6
1368:at
1209:doi
1197:172
1164:doi
1142:791
1103:doi
913:doi
738:3.9
704:).
656:U=3
634:of
622:of
444:(H)
1825::
1353:,
1349:–
1299:^
1285:.
1275:46
1273:.
1269:.
1240:.
1228:^
1207:.
1195:.
1191:.
1176:^
1162:.
1154:.
1140:.
1126:^
1117:,
1101:.
1091:63
1089:.
1085:.
1071:^
1048:12
1046:.
1042:.
1028:^
1011:.
992:^
967:^
935:^
919:.
911:.
909:82
889:^
872:.
855:^
610:.
590:.
578:.
536:AU
474:or
468::
328:km
193:AU
179:yr
157:JD
1565:e
1558:t
1551:v
1500:e
1493:t
1486:v
1318:.
1293:.
1281::
1251:.
1222:.
1211::
1203::
1170:.
1166::
1158::
1148::
1121:)
1113:(
1111:.
1105::
1097::
1065:.
1054::
1022:.
986:.
961:.
929:.
915::
883:.
836:±
828:±
820:±
812:±
804:±
796:±
780:±
772:±
764:±
752:±
744:±
736:±
694:±
686:±
678:±
671:h
667:±
663:(
646:±
638:±
552:°
463:(
434:)
430:(
427:X
408:±
399:±
390:±
370:h
366:±
345:±
336:±
324:±
252:°
167:0
135:)
131:(
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.