1118:
891:
Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results".
567:
at
Sugarloaf Mountain Observatory, Massachusetts, in a collaboration with other American and European astronomers from France, the Czech Republic, Serbia, Georgia and Ukraine. Lightcurve analysis gave a
1006:
642:
444:
87:
1257:
1192:
1547:
1522:
813:
1532:
610:
of 117.2 hours and a spin rate of 18.718 hours with an amplitude 0.08 magnitude. Based on Pray's secondary-to-primary mean diameter ratio (D
448:
310:
46:
1250:
1025:
1218:
1185:
750:
583:
1012:
97:
535:
1139:
1243:
1374:
1178:
29:
781:
276:
1306:
387:
201:
522:
assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 6.5 kilometers based on an
1527:
1465:
1537:
973:
812:
Pray, D.; Pravec, P.; Chiorny, V.; Krugly, Yu. N.; Benishek, V.; Pollock, J.; et al. (November 2014).
833:
586:, it has a relatively fast spin rate for its size, as most minor planets rotate between 2.2 and 20 hours.
1291:
948:
435:, approximately 6.5 kilometers in diameter. It was discovered on 22 September 1919, by German astronomer
1201:
1007:
The determination of the mass of the earth+moon system by the dynamical method from observations of Eros
1455:
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1100:
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41:
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67:
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212:
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and is known for his publications on the observational determination of the length of the
8:
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113:
1022:
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650:
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471:
300:
183:
147:
931:
1475:
919:
742:
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662:
357:
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1324:
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1029:
923:
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34:
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who also proposed the name. The citation was published on 18 February 1992 (
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1274:
1212:
638:
467:
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1401:
526:
of 13.3. No observational results have been published by the space-based
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556:
514:
While "Johnston's
Archive" estimates a diameter of 7.61 kilometers for
151:
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119:
498:
were taken, and no prior identifications were made. On 8 June 2002,
1316:
906:
658:
487:
428:
563:
was obtained from photometric observations by
American astronomer
539:
502:
passed 0.036 AU (5,400,000 km) from the major asteroid
503:
474:
once every 3 years and 5 months (1,236 days). Its orbit has an
1001:
Determination of the
Astronomical Unit by the Dynamical Method
890:
657:
using the dynamical method by observing the near-Earth object
1427:
594:
During Pray's photometric observations, it was revealed that
641:
was named after German astronomer Gert Zech (born 1941) at
527:
349:
1054:
811:
700:"JPL Small-Body Database Browser: 2623 Zech (A919 SA)"
494:
begins with its official discovery observation, as no
622:
estimates a diameter of at least 2.21 kilometers for
966:
572:
of 2.7401 hours with a brightness variation of 0.22
857:
855:
853:
851:
1514:
443:in southwest Germany. It was named after German
848:
731:Dictionary of Minor Planet Names – (2623) Zech
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1186:
1013:Donald Pray at Sugarloaf Mountain Observatory
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1042:Asteroids and comets rotation curves, CdR
905:
881:
796:
729:Schmadel, Lutz D. (2007). "(2623) Zech".
694:
692:
690:
688:
686:
684:
728:
470:main-belt at a distance of 1.7–2.8
1548:Astronomical objects discovered in 1919
1523:Minor planet object articles (numbered)
1050:, Robert Johnston, johnstonsarchive.net
1044:– Observatoire de Genève, Raoul Behrend
938:
717:
1515:
776:
774:
772:
770:
768:
766:
764:
762:
681:
520:Collaborative Asteroid Lightcurve Link
1239:
1174:
784:. Asteroid Lightcurve Database (LCDB)
598:(primary) is in fact an asynchronous
277:Longitude of ascending node
1533:Discoveries by Karl Wilhelm Reinmuth
861:
647:Astronomy and Astrophysics Abstracts
1019:Asteroid Lightcurve Database (LCDB)
818:Central Bureau Electronic Telegrams
759:
13:
661:. Naming citation was prepared by
14:
1559:
994:
1064:AstDyS-2, Asteroids—Dynamic Site
1036:Dictionary of Minor Planet Names
1003:, J. Schubart and G. Zech (1967)
645:in Heidelberg. He was editor of
545:
743:10.1007/978-3-540-29925-7_2624
555:In October 2004, a rotational
431:from the inner regions of the
1:
675:
606:orbiting it. The moon has an
924:10.1016/j.icarus.2015.08.007
7:
782:"LCDB Data for (2623) Zech"
509:
466:that orbits the Sun in the
289:Argument of perihelion
10:
1564:
735:Springer Berlin Heidelberg
550:
420:, provisional designation
114:Minor planet category
1484:
1426:
1363:
1315:
1282:
1273:
1267:Small Solar System bodies
1208:
1048:Asteroids with Satellites
704:Jet Propulsion Laboratory
632:
618:) of more than 0.29, the
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224:Orbital period (sidereal)
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111:
95:
77:
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60:
52:
40:
28:
23:
1028:16 December 2017 at the
702:(2017-06-03 last obs.).
454:
388:Absolute magnitude
311:Physical characteristics
98:Alternative designations
1202:Minor planets navigator
1113:JPL Small-Body Database
589:
337:Synodic rotation period
140:Orbital characteristics
1392:Trans-Neptunian object
1077:Observation prediction
441:Heidelberg Observatory
172:97.70 yr (35,684 days)
1056:– Minor Planet Center
974:"MPC/MPO/MPS Archive"
949:"2623 Zech (A919 SA)"
582:). While not being a
160:Uncertainty parameter
1528:Background asteroids
1365:Distant minor planet
868:johnstonsarchive.net
653:and the mass of the
486:with respect to the
68:MPC designation
1538:Named minor planets
1164:Physical parameters
1015:, Planetary Society
978:Minor Planet Center
953:Minor Planet Center
916:2015Icar..261...34V
830:2014CBET.4012....1P
53:Discovery date
42:Discovery site
20:
1101:Observational info
862:Johnston, Robert.
620:Johnston's Archive
524:absolute magnitude
150:4 September 2017 (
30:Discovered by
18:
1510:
1509:
1422:
1421:
1307:Meanings of names
1233:
1232:
752:978-3-540-00238-3
655:Earth–Moon system
651:astronomical unit
604:minor planet moon
415:
414:
260:0° 17 28.32 / day
56:22 September 1919
1555:
1543:Binary asteroids
1280:
1279:
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1237:
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1156:Orbital elements
1120:
1009:, G. Zech (1968)
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845:
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841:
832:. Archived from
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726:
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714:
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710:
696:
671:
663:Lutz D. Schmadel
628:
581:
423:
402:
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366:
358:Geometric albedo
348:
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330:
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91:
24:Discovery
21:
17:
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1511:
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1359:
1311:
1269:
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1234:
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1225:2624 Samitchell
1204:
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1093:Proper elements
1030:Wayback Machine
997:
992:
982:
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967:
957:
955:
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837:
836:on 12 June 2015
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737:. p. 214.
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682:
678:
666:
635:
626:
617:
613:
600:binary asteroid
592:
577:
570:rotation period
553:
548:
512:
492:observation arc
478:of 0.24 and an
464:S-type asteroid
457:
421:
398:
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375:
364:
360:
344:
342:
339:
328:
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323:
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257:
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202:Semi-major axis
168:Observation arc
127:
116:
100:
85:
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47:Heidelberg Obs.
12:
11:
5:
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1504:
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1466:Near-parabolic
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1438:
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1419:
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1416:
1415:
1414:
1412:Scattered disc
1409:
1404:
1399:
1389:
1384:
1383:
1382:
1380:Neptune trojan
1377:
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1361:
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1355:Spectral types
1352:
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1345:Jupiter trojan
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1124:Close approach
1105:
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1103:
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1045:
1039:
1038:, Google books
1033:
1021:, query form (
1016:
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995:External links
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608:orbital period
591:
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565:Donald P. Pray
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1335:Asteroid belt
1333:
1331:
1330:Aten asteroid
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1275:Minor planets
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1213:2622 Bolzano
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1148:Orbit diagram
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921:
917:
913:
908:
903:
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895:
887:
885:
869:
865:
864:"(2623) Zech"
858:
856:
854:
852:
835:
831:
827:
823:
819:
815:
814:"(2623) Zech"
808:
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629:s companion.
625:
621:
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566:
562:
558:
546:Binary system
543:
541:
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521:
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497:
493:
490:. The body's
489:
485:
481:
477:
473:
469:
465:
461:
452:
450:
446:
442:
438:
437:Karl Reinmuth
434:
433:asteroid belt
430:
427:
424:, is a stony
419:
410:
406:
395:
392:
391:
384:
380:
377:
374:
373:Spectral type
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103:A919 SA
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55:
51:
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45:
43:
39:
36:
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27:
22:
16:
1502:Space debris
1217:
1159:
1151:
1143:
1135:
1127:
1111:
1096:
1088:
1085:Orbital info
1080:
1072:
1063:
981:. Retrieved
977:
968:
956:. Retrieved
952:
897:
893:
871:. Retrieved
867:
838:. Retrieved
834:the original
821:
817:
786:. Retrieved
730:
707:. Retrieved
646:
639:minor planet
636:
623:
619:
595:
593:
584:fast rotator
560:
554:
519:
515:
513:
499:
476:eccentricity
459:
458:
417:
416:
404:
389:
324:(calculated)
240:Mean anomaly
233:(1,236 days)
213:Eccentricity
123:
107: 1963 RE
104:
61:Designations
15:
1492:Cosmic dust
1456:Long-period
1446:Halley-type
1402:Kuiper belt
1287:Designation
824:(4012): 1.
504:3 Juno
496:precoveries
480:inclination
462:is a stony
447:astronomer
266:Inclination
255:Mean motion
90:astronomer)
79:Named after
73:(2623) Zech
35:K. Reinmuth
1517:Categories
1497:Meteoroids
1476:Sungrazing
1451:Hyperbolic
1407:Oort cloud
1350:Near-Earth
907:1506.00762
676:References
557:lightcurve
329:(estimate)
318:Dimensions
301:satellites
191:Perihelion
154:2458000.5)
1387:Damocloid
1219:2623 Zech
1140:Ephemeris
1132:Discovery
1108:2623 Zech
1069:Ephemeris
1060:2623 Zech
900:: 34–47.
574:magnitude
542:surveys.
449:Gert Zech
418:2623 Zech
407: 13.3
365:(assumed)
207:2.2545 AU
195:1.7243 AU
120:main-belt
83:Gert Zech
19:2623 Zech
1471:Periodic
1397:Detached
1317:Asteroid
1026:Archived
983:25 March
958:25 March
932:53493339
873:25 March
788:25 March
659:433 Eros
510:Diameter
488:ecliptic
429:asteroid
327:7.61 km
322:6.50 km
178:Aphelion
1436:Extinct
1375:Centaur
1110:at the
912:Bibcode
826:Bibcode
602:with a
551:Primary
540:NEOWISE
422:A919 SA
381:
294:22.883°
282:349.11°
270:4.0548°
182:2.7846
142:
134:
1428:Comets
1340:Family
1325:Active
1292:Groups
1160:·
1158:
1152:·
1150:
1144:·
1142:
1136:·
1134:
1128:·
1126:
1097:·
1095:
1089:·
1087:
1081:·
1079:
1073:·
1071:
930:
894:Icarus
840:3 July
749:
709:3 July
668:M.P.C.
633:Naming
579:U=n.a.
534:, and
518:, the
426:binary
405:·
403:
347:0.0002
343:2.7401
299:Known
245:324.18
217:0.2352
124:·
122:
105:·
1485:Other
1441:Great
1162:
1154:
1146:
1138:
1130:
1099:
1091:
1083:
1075:
928:S2CID
902:arXiv
670:19692
637:This
627:'
532:Akari
468:inner
455:Orbit
397:13.13
363:0.20
229:3.39
148:Epoch
130:inner
126:
1461:Lost
1302:Moon
1297:List
1023:info
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