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1621 Druzhba

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1550: 1192:
Hanus, J.; Durech, J.; Oszkiewicz, D. A.; Behrend, R.; Carry, B.; Delbo, M.; et al. (February 2016). "New and updated convex shape models of asteroids based on optical data from a large collaboration network".
696:, as the vast majority of minor planets rotate every 2 to 20 hours around their axis. Druzhba's long rotation period was particularly difficulty to measure: Previously, observations by Richard Ditteon at 1689: 1624: 1979: 1954: 26: 790: 352: 1964: 1682: 1617: 1437: 887: 693: 588: 1650: 113: 984:
Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011).
733: 1974: 1675: 1806: 1610: 1463: 44: 329: 1290:
Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015).
1738: 1017: 619:, one of the largest collisional groups of stony asteroids in the main-belt. It orbits the Sun at a distance of 2.0–2.5  254: 1897: 1969: 1571: 1723: 914: 1887: 1877: 1041:
Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C.; et al. (November 2012).
944: 871: 25: 1882: 1292:"Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results" 840: 56: 1959: 1718: 773: 82: 1043:"Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids" 707: 1348:"Absolute magnitudes of asteroids and a revision of asteroid albedo estimates from WISE thermal observations" 1902: 1786: 1698: 1544: 575: 489: 400: 359: 283: 243: 230: 1823: 1347: 1291: 1242: 1144: 1103: 1042: 799: 516: 511: 1395: 1728: 1633: 680: 652: 495: 341: 212: 595:, approximately 10 kilometers in diameter. It was discovered on 1 October 1926, by Russian astronomer 1796: 1532: 1508: 1500: 1485: 1359: 1313: 1254: 1212: 1156: 1115: 1064: 997: 952: 624: 265: 1524: 1516: 1491: 794: 741: 628: 318: 1303: 1202: 1054: 748: 697: 668: 600: 525: 61: 1579: 1346:
Pravec, Petr; Harris, Alan W.; Kusnirák, Peter; Galád, Adrián; Hornoch, Kamil (September 2012).
740:
mission, Druzhba measures between 9.08 and 12.69 kilometers in diameter, and its surface has an
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begins at the discovering observatory, one week after its official discovery observation.
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derives a diameter of 9.05 kilometers and an albedo of 0.243 – similar to the albedo of
1843: 1811: 1776: 1656: 1587: 1549: 1456: 632: 299: 276: 1460: 1948: 1867: 1766: 1761: 1076: 592: 1102:
Wisniewski, W. Z.; Michalowski, T. M.; Harris, A. W.; McMillan, R. S. (March 1995).
1933: 1706: 879: 768: 616: 292: 186: 172: 1224: 689:) A 2016-published modeled light-curve of 99.100 hours concurred with the result. 1371: 1325: 836: 1923: 1872: 1833: 1479: 1243:"Asteroids Observed from GMARS and Santana Observatories: 2009 June - September" 1145:"Asteroid Lightcurve Analysis at the Oakley Observatory - October-November 2006" 778: 604: 307: 100: 1021: 1892: 1838: 1429: 672: 204: 31: 1266: 1168: 1010: 985: 1928: 1818: 1667: 785:, Ukraine, Bulgaria and Kazakhstan. The asteroid's name was proposed by the 724:
According to the surveys carried out by the Infrared Astronomical Satellite
178: 1602: 1748: 636: 584: 1422:
Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008)
756: 737: 986:"Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey" 943:
Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004).
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on the Crimean peninsula. It was named after the Russian word for
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obtained a period of only 12 hours in the late 1980s (Δmag 0.16;
675:
of Druzhba from photometric observations. In gave a well-defined
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once every 3 years and 4 months (1,216 days). Its orbit has an
1420:
Schmadel, Lutz D. "Appendix – Publication Dates of the MPCs".
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Discovery Circumstances: Numbered Minor Planets (1)-(5000)
837:"JPL Small-Body Database Browser: 1621 Druzhba (1926 TM)" 1108:
Abstracts of the Lunar and Planetary Science Conference
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NASA Planetary Data System – IRAS-A-FPA-3-RDR-IMPS-V6.0
679:of 99.20 hours with a change in brightness of 0.75 1916: 1858: 1795: 1747: 1705: 523: 487: 448: 398: 358: 351: 339: 327: 317: 305: 290: 274: 264: 252: 242: 229: 219: 192: 170: 111: 92: 80: 75: 67: 55: 43: 38: 1143:Ditteon, Richard; Hawkins, Scot (September 2007). 1236: 1234: 1097: 1095: 1093: 990:Publications of the Astronomical Society of Japan 868:Dictionary of Minor Planet Names – (1621) Druzhba 781:and the name of several cities, towns and other 700:gave a period solution of 47.9 hours (Δmag 1.0; 1390: 1388: 1138: 1136: 1036: 1034: 1032: 1030: 1683: 1618: 1285: 1283: 1187: 1185: 1104:"Photoelectric Observations of 125 Asteroids" 8: 866:Schmadel, Lutz D. (2007). "(1621) Druzhba". 759:, the family's largest member and namesake. 667:In August 2009, American amateur astronomer 18: 1424:. Springer Berlin Heidelberg. p. 221. 1711: 1690: 1676: 1668: 1625: 1611: 1603: 1548: 861: 859: 857: 24: 1480:Asteroids and comets rotation curves, CdR 1307: 1206: 1058: 1009: 831: 829: 827: 825: 823: 821: 819: 817: 1980:Astronomical objects discovered in 1926 1955:Minor planet object articles (numbered) 1482:– Observatoire de Genève, Raoul Behrend 979: 977: 975: 973: 938: 936: 934: 932: 813: 909: 907: 905: 903: 901: 899: 753:Collaborative Asteroid Lightcurve Link 17: 917:. Asteroid Lightcurve Database (LCDB) 330:Longitude of ascending node 7: 1241:Stephens, Robert D. (January 2010). 1553: 1457:Asteroid Lightcurve Database (LCDB) 734:Wide-field Infrared Survey Explorer 787:Institute of Theoretical Astronomy 14: 1047:The Astrophysical Journal Letters 1496:AstDyS-2, Asteroids—Dynamic Site 1474:Dictionary of Minor Planet Names 789:in St. Petersburg. The official 30:Shape model of Druzhba from its 1965:Discoveries by Sergei Belyavsky 945:"IRAS Minor Planet Survey V6.0" 915:"LCDB Data for (1621) Druzhba" 880:10.1007/978-3-540-29925-7_1622 591:from the inner regions of the 1: 1372:10.1016/j.icarus.2012.07.026 1326:10.1016/j.icarus.2015.08.007 777:, this is a Slavic word for 1225:10.1051/0004-6361/201527441 706:), while Polish astronomer 692:This makes it a relatively 615:Druzhba is a member of the 342:Argument of perihelion 1996: 1195:Astronomy and Astrophysics 1077:10.1088/2041-8205/759/1/L8 872:Springer Berlin Heidelberg 173:Minor planet category 1975:S-type asteroids (Tholen) 1714: 1699:Small Solar System bodies 1640: 1430:10.1007/978-3-642-01965-4 1247:The Minor Planet Bulletin 1149:The Minor Planet Bulletin 841:Jet Propulsion Laboratory 744:between 0.237 and 0.312. 565: 277:Orbital period (sidereal) 211: 199: 23: 1466:16 December 2017 at the 1396:"1621 Druzhba (1926 TM)" 839:(2017-03-29 last obs.). 647:Physical characteristics 611:Classification and orbit 526:Absolute magnitude  353:Physical characteristics 114:Alternative designations 1634:Minor planets navigator 1545:JPL Small-Body Database 1217:2016A&A...586A.108H 576:provisional designation 401:Synodic rotation period 194:Orbital characteristics 1824:Trans-Neptunian object 1509:Observation prediction 1011:10.1093/pasj/63.5.1117 732:satellite, and NASA's 671:obtained a rotational 655:, Druzhba is a common 583:), is a stony Florian 225:90.49 yr (33,052 days) 1488:– Minor Planet Center 793:was published by the 653:Tholen classification 213:Uncertainty parameter 1797:Distant minor planet 783:localities in Russia 736:with its subsequent 635:with respect to the 83:MPC designation 1970:Named minor planets 1596:Physical parameters 1400:Minor Planet Center 1364:2012Icar..221..365P 1318:2015Icar..261...34V 1259:2010MPBu...37...28S 1161:2007MPBu...34...59D 1120:1995LPI....26.1511W 1069:2012ApJ...759L...8M 1022:AcuA catalog p. 153 1002:2011PASJ...63.1117U 957:2004PDSS...12.....T 795:Minor Planet Center 720:Diameter and albedo 68:Discovery date 57:Discovery site 20: 1533:Observational info 749:absolute magnitude 708:Wiesław Wiśniewski 698:Oakley Observatory 669:Robert D. Stephens 601:Simeiz Observatory 203:4 September 2017 ( 45:Discovered by 1942: 1941: 1854: 1853: 1739:Meanings of names 1665: 1664: 1439:978-3-642-01964-7 889:978-3-540-00238-3 569: 568: 1987: 1712: 1692: 1685: 1678: 1669: 1645:1620 Geographos 1627: 1620: 1613: 1604: 1588:Orbital elements 1552: 1444: 1443: 1417: 1411: 1410: 1408: 1406: 1392: 1383: 1382: 1380: 1378: 1343: 1337: 1336: 1334: 1332: 1311: 1287: 1278: 1277: 1275: 1273: 1238: 1229: 1228: 1210: 1189: 1180: 1179: 1177: 1175: 1140: 1131: 1130: 1128: 1126: 1099: 1088: 1087: 1085: 1083: 1062: 1038: 1025: 1015: 1013: 996:(5): 1117–1138. 981: 968: 967: 965: 963: 940: 927: 926: 924: 922: 911: 894: 893: 863: 852: 851: 849: 847: 833: 803: 797:on 1 June 1967 ( 715: 705: 688: 597:Sergey Belyavsky 581: 561: 559: 550: 12.39  545: 543: 483: 481: 475: 473: 467: 462: 460: 451:Geometric albedo 443: 441: 434: 432: 426: 422: 420: 414: 408: 393: 391: 384: 382: 375: 373: 367: 313:0° 17 45.6 / day 166: 154: 147: 136: 107: 28: 21: 1995: 1994: 1990: 1989: 1988: 1986: 1985: 1984: 1960:Flora asteroids 1945: 1944: 1943: 1938: 1912: 1850: 1791: 1743: 1701: 1696: 1666: 1661: 1636: 1631: 1525:Proper elements 1468:Wayback Machine 1453: 1448: 1447: 1440: 1419: 1418: 1414: 1404: 1402: 1394: 1393: 1386: 1376: 1374: 1345: 1344: 1340: 1330: 1328: 1289: 1288: 1281: 1271: 1269: 1240: 1239: 1232: 1191: 1190: 1183: 1173: 1171: 1142: 1141: 1134: 1124: 1122: 1101: 1100: 1091: 1081: 1079: 1040: 1039: 1028: 983: 982: 971: 961: 959: 942: 941: 930: 920: 918: 913: 912: 897: 890: 874:. p. 128. 865: 864: 855: 845: 843: 835: 834: 815: 810: 798: 791:naming citation 765: 728:, the Japanese 722: 711: 701: 684: 677:rotation period 665: 663:Rotation period 657:S-type asteroid 649: 641:observation arc 627:of 0.12 and an 613: 587:and relatively 579: 557: 555: 541: 539: 531: 515: 510: 492: 479: 477: 476: 471: 469: 468: 465: 463: 458: 456: 453: 439: 437: 436: 430: 428: 427: 424: 418: 416: 415: 412: 406: 403: 389: 387: 386: 380: 378: 377: 371: 369: 368: 365: 344: 332: 310: 295: 279: 257: 255:Semi-major axis 221:Observation arc 175: 165: 161: 160: 153: 149: 148: 146: 142: 135: 131: 130: 124: 116: 105: 104: 95: 85: 34: 12: 11: 5: 1993: 1991: 1983: 1982: 1977: 1972: 1967: 1962: 1957: 1947: 1946: 1940: 1939: 1937: 1936: 1931: 1926: 1920: 1918: 1914: 1913: 1911: 1910: 1905: 1900: 1898:Near-parabolic 1895: 1890: 1885: 1880: 1875: 1870: 1864: 1862: 1856: 1855: 1852: 1851: 1849: 1848: 1847: 1846: 1844:Scattered disc 1841: 1836: 1831: 1821: 1816: 1815: 1814: 1812:Neptune trojan 1809: 1801: 1799: 1793: 1792: 1790: 1789: 1787:Spectral types 1784: 1779: 1777:Jupiter trojan 1774: 1769: 1764: 1759: 1753: 1751: 1745: 1744: 1742: 1741: 1736: 1731: 1726: 1721: 1715: 1709: 1703: 1702: 1697: 1695: 1694: 1687: 1680: 1672: 1663: 1662: 1660: 1659: 1657:1622 Chacornac 1654: 1647: 1641: 1638: 1637: 1632: 1630: 1629: 1622: 1615: 1607: 1601: 1600: 1599: 1598: 1556:Close approach 1537: 1536: 1535: 1489: 1483: 1477: 1476:, Google books 1471: 1459:, query form ( 1452: 1451:External links 1449: 1446: 1445: 1438: 1412: 1384: 1358:(1): 365–387. 1338: 1279: 1230: 1181: 1132: 1089: 1026: 969: 928: 895: 888: 853: 812: 811: 809: 806: 764: 761: 751:of 12.37, the 721: 718: 664: 661: 648: 645: 612: 609: 567: 566: 563: 562: 532: 524: 521: 520: 493: 488: 485: 484: 454: 449: 446: 445: 404: 399: 396: 395: 362: 356: 355: 349: 348: 345: 340: 337: 336: 333: 328: 325: 324: 321: 315: 314: 311: 306: 303: 302: 296: 291: 288: 287: 280: 275: 272: 271: 268: 262: 261: 258: 253: 250: 249: 246: 240: 239: 233: 227: 226: 223: 217: 216: 209: 208: 197: 196: 190: 189: 176: 171: 168: 167: 163: 151: 144: 133: 117: 112: 109: 108: 98:дружба – lit. 96: 93: 90: 89: 88:(1621) Druzhba 86: 81: 78: 77: 73: 72: 71:1 October 1926 69: 65: 64: 59: 53: 52: 47: 41: 40: 36: 35: 29: 13: 10: 9: 6: 4: 3: 2: 1992: 1981: 1978: 1976: 1973: 1971: 1968: 1966: 1963: 1961: 1958: 1956: 1953: 1952: 1950: 1935: 1932: 1930: 1927: 1925: 1922: 1921: 1919: 1915: 1909: 1906: 1904: 1901: 1899: 1896: 1894: 1891: 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590: 586: 582: 577: 573: 564: 553: 549: 537: 533: 530: 529: 522: 518: 513: 509: 505: 501: 497: 494: 491: 490:Spectral type 486: 455: 452: 447: 411: 405: 402: 397: 363: 361: 357: 354: 350: 346: 343: 338: 334: 331: 326: 322: 320: 316: 312: 309: 304: 301: 297: 294: 289: 285: 281: 278: 273: 269: 267: 263: 259: 256: 251: 247: 245: 241: 238: 234: 232: 228: 224: 222: 218: 214: 210: 206: 202: 198: 195: 191: 188: 184: 180: 177: 174: 169: 158: 140: 128: 125:1931 EO  122: 119:1926 TM  118: 115: 110: 103: 102: 97: 91: 87: 84: 79: 74: 70: 66: 63: 60: 58: 54: 51: 50:S. Belyavskyj 48: 46: 42: 37: 33: 27: 22: 16: 1934:Space debris 1651:1621 Druzhba 1649: 1591: 1583: 1575: 1567: 1559: 1543: 1540:1621 Druzhba 1528: 1520: 1517:Orbital info 1512: 1504: 1495: 1492:1621 Druzhba 1421: 1415: 1403:. Retrieved 1399: 1375:. Retrieved 1355: 1351: 1341: 1329:. Retrieved 1299: 1295: 1270:. Retrieved 1253:(1): 28–29. 1250: 1246: 1198: 1194: 1172:. Retrieved 1155:(3): 59–64. 1152: 1148: 1123:. Retrieved 1111: 1107: 1080:. Retrieved 1050: 1046: 993: 989: 960:. Retrieved 948: 919:. Retrieved 867: 844:. Retrieved 786: 772: 769:minor planet 766: 757:8 Flora 752: 747:Based on an 746: 723: 694:slow rotator 691: 666: 650: 639:. Druzhba's 625:eccentricity 617:Flora family 614: 589:slow rotator 578: 572:1621 Druzhba 571: 570: 551: 547: 535: 527: 503: 293:Mean anomaly 286:(1,216 days) 266:Eccentricity 182: 159: 1958 GA 156: 138: 129: 1946 UH 126: 123: 1927 AE 120: 106:(in Russian) 99: 76:Designations 19:1621 Druzhba 15: 1924:Cosmic dust 1888:Long-period 1878:Halley-type 1834:Kuiper belt 1719:Designation 1405:28 December 1377:28 December 1331:28 December 1272:28 December 1174:28 December 1125:28 December 1082:28 December 921:28 December 629:inclination 534:11.63  319:Inclination 308:Mean motion 94:Named after 62:Simeiz Obs. 1949:Categories 1929:Meteoroids 1908:Sungrazing 1883:Hyperbolic 1839:Oort cloud 1782:Near-Earth 1309:1506.00762 1208:1510.07422 962:17 October 808:References 779:friendship 771:was named 673:lightcurve 605:friendship 360:Dimensions 244:Perihelion 207:2458000.5) 101:friendship 32:lightcurve 1819:Damocloid 1572:Ephemeris 1564:Discovery 1501:Ephemeris 1302:: 34–47. 1267:1052-8091 1169:1052-8091 1060:1209.5794 681:magnitude 466:(derived) 366:(derived) 260:2.2299 AU 248:1.9650 AU 179:main-belt 39:Discovery 1903:Periodic 1829:Detached 1749:Asteroid 1464:Archived 1114:: 1511. 1053:(1): 5. 637:ecliptic 585:asteroid 364:9.05 km 231:Aphelion 1868:Extinct 1807:Centaur 1542:at the 1360:Bibcode 1314:Bibcode 1255:Bibcode 1213:Bibcode 1157:Bibcode 1116:Bibcode 1065:Bibcode 998:Bibcode 953:Bibcode 774:Druzhba 738:NEOWISE 651:In the 580:1926 TM 519:= 0.503 514:= 0.898 425:(dated) 413:(dated) 347:238.14° 335:181.88° 323:3.1730° 235:2.4948 162:1979 QP 150:1951 ER 143:1951 EK 132:1949 QS 1860:Comets 1772:Family 1757:Active 1724:Groups 1592:· 1590:  1584:· 1582:  1576:· 1574:  1568:· 1566:  1560:· 1558:  1529:· 1527:  1521:· 1519:  1513:· 1511:  1505:· 1503:  1436:  1352:Icarus 1296:Icarus 1265:  1201:: 24. 1167:  1018:online 886:  846:4 June 800:M.P.C. 763:Naming 742:albedo 552:· 548:· 546:  536:· 504:· 502:  496:Tholen 464:0.243 457:0.2373 429:99.100 388:12.694 298:73.187 270:0.1188 183:· 181:  157:· 155:  139:· 137:  127:· 121:· 1917:Other 1873:Great 1594: 1586: 1578: 1570: 1562: 1531: 1523: 1515: 1507: 1304:arXiv 1203:arXiv 1055:arXiv 767:This 730:Akari 556:12.53 554: 540:12.37 538: 506: 482:0.012 478:0.312 474:0.039 470:0.244 461:0.046 438:99.20 433:0.005 392:0.296 379:11.70 282:3.33 201:Epoch 187:Flora 185: 141: 1893:Lost 1734:Moon 1729:List 1461:info 1434:ISBN 1407:2016 1379:2016 1333:2016 1274:2016 1263:ISSN 1176:2016 1165:ISSN 1127:2016 1084:2016 964:2019 923:2016 884:ISBN 848:2017 802:2740 726:IRAS 631:of 3 560:0.29 544:0.09 442:0.03 417:47.9 383:0.20 370:9.08 1494:at 1426:doi 1368:doi 1356:221 1322:doi 1300:261 1221:doi 1199:586 1073:doi 1051:759 1006:doi 876:doi 804:). 716:). 713:U=1 703:U=1 686:U=3 599:at 528:(H) 517:U–B 512:B–V 421:0.5 374:0.8 1951:: 1432:. 1398:. 1387:^ 1366:. 1354:. 1350:. 1320:. 1312:. 1298:. 1294:. 1282:^ 1261:. 1251:37 1249:. 1245:. 1233:^ 1219:. 1211:. 1197:. 1184:^ 1163:. 1153:34 1151:. 1147:. 1135:^ 1112:26 1110:. 1106:. 1092:^ 1071:. 1063:. 1049:. 1045:. 1029:^ 1020:, 1004:. 994:63 992:. 988:. 972:^ 951:. 947:. 931:^ 898:^ 882:. 870:. 856:^ 816:^ 659:. 621:AU 607:. 498:= 423:h 407:12 394:km 385:km 376:km 284:yr 237:AU 205:JD 1691:e 1684:t 1677:v 1626:e 1619:t 1612:v 1470:) 1442:. 1428:: 1409:. 1381:. 1370:: 1362:: 1335:. 1324:: 1316:: 1306:: 1276:. 1257:: 1227:. 1223:: 1215:: 1205:: 1178:. 1159:: 1129:. 1118:: 1086:. 1075:: 1067:: 1057:: 1024:) 1016:( 1014:. 1008:: 1000:: 966:. 955:: 925:. 892:. 878:: 850:. 683:( 633:° 574:( 558:± 542:± 508:S 500:S 480:± 472:± 459:± 444:h 440:± 435:h 431:± 419:± 410:h 390:± 381:± 372:± 300:° 215:0 164:4 152:1 145:1 134:1

Index


lightcurve
Discovered by
S. Belyavskyj
Discovery site
Simeiz Obs.
MPC designation
friendship
Alternative designations
Minor planet category
main-belt
Flora
Orbital characteristics
Epoch
JD
Uncertainty parameter
Observation arc
Aphelion
AU
Perihelion
Semi-major axis
Eccentricity
Orbital period (sidereal)
yr
Mean anomaly
°
Mean motion
Inclination
Longitude of ascending node
Argument of perihelion

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