1289:
3567:
3591:
3615:
1237:
3603:
28:
1219:
star in the night sky with a visual magnitude of +2.0. It has two companions—Ab and B, the latter known for the longest time and the former discovered recently, producing a combined magnitude for the trio of +1.77. The stars are members of the
1895:
Kharchenko, N.V.; Scholz, R.-D.; Piskunov, A.E.; Röser, S.; Schilbach, E. (2007). "Astrophysical supplements to the ASCC-2.5: Ia. Radial velocities of ~55000 stars and mean radial velocities of 516 Galactic open clusters and associations".
1430:(WGSN) to catalog and standardize proper names for stars. The WGSN's first bulletin of July 2016 included a table of the first two batches of names approved by the WGSN; which included
1971:
Raassen, A. J. J.; Van Der Hucht, K. A.; Miller, N. A.; Cassinelli, J. P. (2008). "XMM-Newton observations of ζ Orionis (O9.7 Ib): A collisional ionization equilibrium model".
1056:
2024:
Buysschaert, B.; Neiner, C.; Ramiaramanantsoa, T.; Richardson, N. D.; David-Uraz, A.; Moffat, A. F. J. (2016). "Understanding the photometric variability of ζ OriAa".
785:
2381:
1300:
at the eastern end of Orion's Belt, the second-magnitude primary having a 4th-magnitude companion nearly 3 arcseconds distant, in an orbit taking over 1,500 years.
1793:
Hummel, C. A.; Rivinius, T.; Nieva, M. -F.; Stahl, O.; Van Belle, G.; Zavala, R. T. (2013). "Dynamical mass of the O-type supergiant in ζ Orionis A".
1280:, but this does not take into account distortions caused by the multiple nature of the system and larger distances have been derived by many authors.
1260:
3675:
3660:
2256:
1650:
1372:
A fourth star, 9th-magnitude
Alnitak C, has not been confirmed to be part of the Aa–Ab–B group, and may simply lie along the line of sight.
2374:
1537:
1476:
1388:
3690:
1423:
3665:
1585:
1514:
47:
3650:
3570:
2367:
2274:
1488:
1061:
3379:
2957:
2411:
1480:
986:
827:
3581:
3645:
3550:
3542:
3094:
2962:
67:
3635:
1427:
3680:
3670:
2406:
2061:
Blazère, A.; Neiner, C.; Tkachenko, A.; Bouret, J.-C.; Rivinius, Th. (2015). "The magnetic field of ζ Orionis A".
1731:
Ducati, J. R. (2002). "VizieR Online Data
Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system".
2874:
1251:, has been of widespread cultural significance. It was reported to be a double star by amateur German astronomer
1095:
1079:
1369:
of spectral type B1IV with an absolute magnitude of −3.9 and an apparent magnitude of 4.3, discovered in 1998.
1607:
3685:
3655:
3640:
3279:
3035:
2401:
1510:
1339:
1216:
1091:
1075:
666:
489:
169:
3225:
2972:
2671:
2390:
1506:
1404:
1221:
1161:
1153:
1046:
1041:
947:
793:
633:
435:
60:
2152:
2080:
2043:
1990:
1915:
1859:
1812:
1740:
1694:
606:
395:
283:
3154:
2180:
1303:
The part called
Alnitak A is itself a close binary, comprising the stars Alnitak Aa and Alnitak Ab.
1052:
3619:
2201:
2096:
2070:
2033:
2006:
1980:
1939:
1905:
1828:
1802:
1710:
1684:
1565:
1319:
1315:
1256:
1252:
304:
136:
3429:
2346:
2338:
3284:
2486:
2440:
2330:
2252:
1931:
1877:
1646:
1521:
1469:
1396:
1133:
1124:
1037:
1033:
1007:
855:
651:
460:
156:
43:
2342:
2334:
2326:
2322:
3595:
3409:
3159:
2573:
2568:
2526:
2521:
2516:
2511:
2506:
2501:
2496:
2491:
2421:
2160:
2088:
2084:
1998:
1994:
1923:
1867:
1863:
1820:
1816:
1702:
1698:
1327:
1115:
934:
815:
753:
267:
74:
2623:
2278:
2225:
1846:
Fabricius, C.; Høg, E.; Makarov, V. V.; Mason, B. D.; Wycoff, G. L.; Urban, S. E. (2002).
1212:
766:
592:
372:
215:
161:
112:
2416:
1443:
1240:
1193:
2156:
2120:
2047:
1919:
1744:
1643:
A Dictionary of Modern star Names: A Short Guide to 254 Star Names and Their
Derivations
2533:
1347:
1288:
1025:
575:
512:
386:
352:
275:
255:
243:
1255:
in 1819. Much more recently, in 1998, the bright primary was found by a team from the
3629:
3524:
2942:
2661:
2613:
1943:
1311:
1149:
232:
55:
2100:
2010:
1832:
1714:
3607:
3519:
3444:
3384:
3214:
3084:
2937:
2932:
2656:
2646:
2641:
2636:
2631:
2538:
2293:
1622:
1259:
to have a close companion; this had been suspected from observations made with the
1225:
916:
875:
733:
692:
33:
2272:
AEEA (Activities of
Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 5 月 25 日
2271:
2092:
1824:
1434:
for the star ζ Orionis Aa. It is now so entered in the IAU Catalog of Star Names.
2354:
2002:
1872:
1847:
1706:
3200:
2618:
2608:
2603:
2598:
2593:
2588:
2583:
2578:
2478:
1597:
1297:
1145:
619:
414:
191:
180:
125:
3514:
3509:
3439:
3434:
3374:
3195:
3190:
3185:
3119:
3114:
3109:
3104:
2927:
2922:
2917:
2912:
2907:
2902:
2897:
2864:
2859:
2854:
2849:
2844:
2839:
2834:
2829:
2824:
2819:
2814:
2809:
2804:
2799:
2794:
2789:
2784:
2779:
2774:
2769:
2764:
2759:
2754:
2749:
2744:
2739:
2734:
2729:
2724:
2719:
2714:
2709:
2704:
2699:
2694:
2689:
2651:
2563:
2558:
2553:
2448:
1549:
1359:
1331:
1323:
1307:
889:
746:
706:
648:
457:
290:
203:
2026:
Second Brite-Constellation
Science Conference: Small Satellites – Big Science
1935:
1881:
1448:
The three belt stars were collectively known by many names in many cultures.
3177:
3068:
2892:
2887:
2882:
2684:
2679:
2458:
1604:
1553:
1355:
1343:
1335:
1272:
2310:
1927:
27:
3493:
3488:
3483:
3478:
3473:
3424:
3394:
3369:
3364:
3348:
3343:
3338:
3333:
3328:
3323:
3318:
3313:
3263:
3258:
3253:
3248:
3243:
3238:
3233:
3149:
3144:
3134:
3129:
3063:
3058:
3053:
3048:
3043:
3025:
3020:
3010:
3005:
3000:
2995:
2990:
2985:
2980:
2359:
2350:
1366:
1267:
1014:
969:
862:
3419:
3139:
3124:
3099:
3089:
3015:
2952:
2947:
2468:
2463:
2318:
1545:
1541:
1351:
1236:
1201:
1197:
3458:
3414:
3404:
3389:
3298:
2548:
2311:
NASA Astronomy
Picture of the Day: Image of Alnitak (12 January 2010)
1957:
1675:
Van
Leeuwen, F. (2007). "Validation of the new Hipparcos reduction".
1496:
1449:
1415:
1376:
1277:
1185:
1109:
954:
902:
807:
719:
295:
3602:
2165:
2140:
2075:
2038:
3399:
2543:
2453:
1985:
1910:
1807:
1689:
1561:
1557:
1326:
and a diameter 20 times greater. It is some 21,000 times brighter
1287:
1235:
547:
324:
2139:
Hummel CA; White NM; Elias NM II; Hajian AR; Nordgren TE (2000).
2431:
1208:
962:
583:
259:
247:
2363:
1464:'the Golden Grains or Nuts' and, in modern Arabic, ميزان الحق
1247:
Alnitak has been known since antiquity and, as a component of
1189:
1414:, alternately spelled Al Nitak or Alnitah, is taken from the
1322:
of 2.0. It is estimated as being up to 33 times as massive
89:
1540:(asterism), refers to an asterism consisting of Alnitak,
1184:. The system is located at a distance of several hundred
95:
77:
2202:"Bulletin of the IAU Working Group on Star Names, No. 1"
1645:(2nd rev. ed.). Cambridge, Massachusetts: Sky Pub.
1215:
with an absolute magnitude of −6.0 and is the brightest
1338:) some 500 times greater. It is the brightest star of
3579:
98:
86:
2125:. New York, Leipzig: G.E. Stechert. pp. 314–15.
92:
80:
3541:
3502:
3466:
3457:
3357:
3306:
3297:
3272:
3224:
3213:
3176:
3077:
3034:
2971:
2873:
2670:
2439:
2430:
83:
1375:The Alnitak system is bathed in the nebulosity of
1346:. In about a million years, it will expand into a
2251:, written by 陳久金. Published by 台灣書房出版有限公司, 2005,
1958:"Sixth Catalog of Orbits of Visual Binary Stars"
2375:
1575:
1569:
1531:
1525:
130:−01° 56′ 34.2649″
16:Triple star system in the constellation Orion
8:
1584:). It is one of the western mansions of the
2134:
2132:
1733:CDS/ADC Collection of Electronic Catalogues
1670:
1668:
1666:
1664:
1662:
1513:. It is one of the western mansions of the
3538:
3463:
3303:
3221:
3173:
2436:
2382:
2368:
2360:
2164:
2074:
2037:
1984:
1909:
1871:
1806:
1788:
1786:
1784:
1782:
1780:
1778:
1776:
1774:
1688:
1292:Alnitak Aa compared to the Sun (to scale)
1261:Narrabri Stellar Intensity Interferometer
46:J2000
2181:"IAU Working Group on Star Names (WGSN)"
2114:
2112:
2110:
1772:
1770:
1768:
1766:
1764:
1762:
1760:
1758:
1756:
1754:
1726:
1724:
3586:
1633:
239:
1472:they were known as The Weighing Beam.
1276:satellite imply a distance around 225
1192:and is one of the three main stars of
18:
1248:
7:
1641:Kunitzsch, Paul; Smart, Tim (2006).
1383:Etymology and cultural significance
1358:explosion, likely leaving behind a
251:
1960:. United States Naval Observatory.
14:
1848:"The Tycho double star catalogue"
1270:derived from observations by the
32:Alnitak (in lower right) and the
3613:
3601:
3589:
3566:
3565:
2119:Allen, Richard Hinckley (1899).
1424:International Astronomical Union
73:
26:
1564:later added. Consequently, the
3676:Henry Draper Catalogue objects
2141:"ζ Orionis A Is a Double Star"
1501:
1492:
1484:
1:
3661:Bright Star Catalogue objects
2412:Orion molecular cloud complex
2122:Star-names and their meanings
1582:the First Star of Three Stars
1422:, "the girdle". In 2016, the
2063:Astronomy & Astrophysics
1795:Astronomy & Astrophysics
1354:before ending its life in a
2226:"IAU Catalog of Star Names"
2093:10.1051/0004-6361/201526855
1825:10.1051/0004-6361/201321434
1576:
1532:
1468:'the Scale of Justice'. In
1428:Working Group on Star Names
289:1,260 ± 180
274:4.43 ± 0.64
3707:
2407:Orion in Chinese astronomy
2003:10.1051/0004-6361:20077891
1973:Astronomy and Astrophysics
1873:10.1051/0004-6361:20011822
1852:Astronomy and Astrophysics
1707:10.1051/0004-6361:20078357
1677:Astronomy and Astrophysics
1441:
1156:. It has the designations
3563:
3537:
3380:Becklin–Neugebauer Object
3172:
2397:
2145:The Astrophysical Journal
1898:Astronomische Nachrichten
1581:
1570:
1526:
1102:
1086:
1070:
1031:
1024:
1020:
979:
975:
868:
685:
680:
546:
323:
319:
209:
202:
150:
40:
24:
1350:wider than the orbit of
1243:with Alnitak on the left
3691:Stars with proper names
2085:2015A&A...582A.110B
1995:2008A&A...478..513R
1864:2002A&A...384..180F
1817:2013A&A...554A..52H
1699:2007A&A...474..653V
1395:) is the star system's
1211:, Alnitak Aa, is a hot
305:Absolute magnitude
174:O9.5Iab + B1IV + B0III
157:Evolutionary stage
137:Apparent magnitude
3666:Durchmusterung objects
3280:Lambda Orionis Cluster
2402:List of stars in Orion
2391:Constellation of Orion
1928:10.1002/asna.200710776
1613:named after the star.
1511:Chinese constellations
1475:The belt was also the
1293:
1244:
667:Argument of periastron
490:Argument of periastron
3651:Orion (constellation)
3285:Trapezium Cluster (θ)
1548:(Orion's Belt), with
1507:twenty-eight mansions
1452:terms include النجاد
1410:The traditional name
1405:Flamsteed designation
1365:Alnitak Ab is a blue
1306:Alnitak Aa is a blue
1291:
1239:
1232:Observational history
1222:Orion OB1 association
634:Longitude of the node
436:Longitude of the node
1460:'the Line', العلقات
1437:
1296:Alnitak is a triple
145:(2.08 + 4.28 + 4.01)
3646:Triple star systems
3543:Astronomical events
2355:Articles and images
2157:2000ApJ...540L..91H
2048:2017sbcs.conf..101B
1920:2007AN....328..889K
1745:2002yCat.2237....0D
1489:traditional Chinese
1103:Database references
987:Rotational velocity
828:Rotational velocity
21:
3636:O-type supergiants
2277:2011-07-16 at the
1481:simplified Chinese
1456:'the Belt', النسك
1332:surface brightness
1320:apparent magnitude
1316:absolute magnitude
1294:
1257:Lowell Observatory
1253:George K. Kunowsky
1245:
1026:Other designations
315:−6.0 / −3.9 / −4.1
170:Spectral type
19:
3681:Hipparcos objects
3671:Flamsteed objects
3577:
3576:
3559:
3558:
3533:
3532:
3453:
3452:
3293:
3292:
3209:
3208:
3168:
3167:
2257:978-986-7332-25-7
1652:978-1-931559-44-7
1611:-class cargo ship
1470:Chinese mythology
1397:Bayer designation
1139:
1138:
3698:
3618:
3617:
3616:
3606:
3605:
3594:
3593:
3592:
3585:
3569:
3568:
3539:
3464:
3410:Horsehead Nebula
3304:
3222:
3174:
2437:
2384:
2377:
2370:
2361:
2307:
2305:
2304:
2281:
2270:
2266:
2260:
2247:
2243:
2237:
2236:
2234:
2232:
2222:
2216:
2215:
2213:
2211:
2206:
2198:
2192:
2191:
2189:
2187:
2177:
2171:
2170:
2168:
2136:
2127:
2126:
2116:
2105:
2104:
2078:
2058:
2052:
2051:
2041:
2021:
2015:
2014:
1988:
1968:
1962:
1961:
1954:
1948:
1947:
1913:
1892:
1886:
1885:
1875:
1843:
1837:
1836:
1810:
1790:
1749:
1748:
1728:
1719:
1718:
1692:
1672:
1657:
1656:
1638:
1583:
1579:
1573:
1572:
1535:
1529:
1528:
1503:
1494:
1486:
1466:Al Mīzān al Ḥaqq
1314:O9.5Iab with an
1268:stellar parallax
1168:and abbreviated
1065:
1050:
914:
912:
887:
885:
848:
846:
805:
803:
783:
781:
731:
729:
704:
702:
671:
656:
638:
597:
505:
503:
494:
482:
480:
476:
473:
465:
449:
447:
440:
427:
425:
408:
406:
389:
384:
377:
365:
363:
254: 2.03
253:
242: 3.19
241:
151:Characteristics
146:
140:
120:
115:
105:
104:
101:
100:
97:
94:
91:
88:
85:
82:
79:
41:Observation data
30:
22:
3706:
3705:
3701:
3700:
3699:
3697:
3696:
3695:
3626:
3625:
3624:
3614:
3612:
3600:
3590:
3588:
3580:
3578:
3573:
3555:
3529:
3498:
3449:
3430:McNeil's Nebula
3353:
3289:
3268:
3216:
3205:
3164:
3160:WISE J0521+1025
3155:WISE J0457−0207
3073:
3030:
2967:
2869:
2666:
2426:
2393:
2388:
2302:
2300:
2292:
2289:
2284:
2279:Wayback Machine
2268:
2267:
2263:
2245:
2244:
2240:
2230:
2228:
2224:
2223:
2219:
2209:
2207:
2204:
2200:
2199:
2195:
2185:
2183:
2179:
2178:
2174:
2138:
2137:
2130:
2118:
2117:
2108:
2060:
2059:
2055:
2023:
2022:
2018:
1970:
1969:
1965:
1956:
1955:
1951:
1894:
1893:
1889:
1845:
1844:
1840:
1792:
1791:
1752:
1730:
1729:
1722:
1674:
1673:
1660:
1653:
1640:
1639:
1635:
1631:
1619:
1594:
1568:for Alnitak is
1446:
1440:
1385:
1318:of −6.0 and an
1286:
1234:
1213:blue supergiant
1066:
1060:
1045:
1042:50 Orionis
1036: Orionis,
993: sin
940:
937:
922:
919:
910:
908:
895:
892:
883:
881:
844:
842:
834: sin
801:
799:
779:
777:
767:Surface gravity
759:
756:
739:
736:
727:
725:
712:
709:
700:
698:
672:
664:
646:
631:
593:Semi-major axis
590:
538:
536:
521:
519:
501:
499:
495:
487:
478:
474:
471:
469:
455:
445:
443:
433:
423:
421:
404:
402:
382:
380:
373:Semi-major axis
370:
361:
359:
310:
294:(387 ± 54
293:
250:
226:18.50 km/s
221:
216:Radial velocity
197:
162:Blue supergiant
144:
135:
118:
113:Right ascension
111:
76:
72:
42:
36:
31:
17:
12:
11:
5:
3704:
3702:
3694:
3693:
3688:
3683:
3678:
3673:
3668:
3663:
3658:
3653:
3648:
3643:
3638:
3628:
3627:
3623:
3622:
3610:
3598:
3575:
3574:
3564:
3561:
3560:
3557:
3556:
3554:
3553:
3547:
3545:
3535:
3534:
3531:
3530:
3528:
3527:
3522:
3517:
3512:
3506:
3504:
3500:
3499:
3497:
3496:
3491:
3486:
3481:
3476:
3470:
3468:
3461:
3455:
3454:
3451:
3450:
3448:
3447:
3442:
3437:
3432:
3427:
3422:
3417:
3412:
3407:
3402:
3397:
3392:
3387:
3382:
3377:
3372:
3367:
3361:
3359:
3355:
3354:
3352:
3351:
3346:
3341:
3336:
3331:
3326:
3321:
3316:
3310:
3308:
3301:
3295:
3294:
3291:
3290:
3288:
3287:
3282:
3276:
3274:
3270:
3269:
3267:
3266:
3261:
3256:
3251:
3246:
3241:
3236:
3230:
3228:
3219:
3211:
3210:
3207:
3206:
3204:
3203:
3198:
3193:
3188:
3182:
3180:
3170:
3169:
3166:
3165:
3163:
3162:
3157:
3152:
3147:
3142:
3137:
3132:
3127:
3122:
3117:
3112:
3107:
3102:
3097:
3092:
3087:
3081:
3079:
3075:
3074:
3072:
3071:
3066:
3061:
3056:
3051:
3046:
3040:
3038:
3032:
3031:
3029:
3028:
3023:
3018:
3013:
3008:
3003:
2998:
2993:
2988:
2983:
2977:
2975:
2969:
2968:
2966:
2965:
2960:
2955:
2950:
2945:
2940:
2935:
2930:
2925:
2920:
2915:
2910:
2905:
2900:
2895:
2890:
2885:
2879:
2877:
2871:
2870:
2868:
2867:
2862:
2857:
2852:
2847:
2842:
2837:
2832:
2827:
2822:
2817:
2812:
2807:
2802:
2797:
2792:
2787:
2782:
2777:
2772:
2767:
2762:
2757:
2752:
2747:
2742:
2737:
2732:
2727:
2722:
2717:
2712:
2707:
2702:
2697:
2692:
2687:
2682:
2676:
2674:
2668:
2667:
2665:
2664:
2659:
2654:
2649:
2644:
2639:
2634:
2629:
2621:
2616:
2611:
2606:
2601:
2596:
2591:
2586:
2581:
2576:
2571:
2566:
2561:
2556:
2551:
2546:
2541:
2536:
2531:
2530:
2529:
2524:
2519:
2514:
2509:
2504:
2499:
2494:
2484:
2476:
2471:
2466:
2461:
2456:
2451:
2449:α (Betelgeuse)
2445:
2443:
2434:
2428:
2427:
2425:
2424:
2419:
2414:
2409:
2404:
2398:
2395:
2394:
2389:
2387:
2386:
2379:
2372:
2364:
2358:
2357:
2315:
2313:
2308:
2288:
2287:External links
2285:
2283:
2282:
2261:
2238:
2217:
2193:
2172:
2166:10.1086/312882
2151:(2): L91–L93.
2128:
2106:
2053:
2016:
1963:
1949:
1904:(9): 889–896.
1887:
1858:(1): 180–189.
1838:
1750:
1720:
1683:(2): 653–664.
1658:
1651:
1632:
1630:
1627:
1626:
1625:
1618:
1615:
1593:
1590:
1505:), one of the
1442:Main article:
1439:
1436:
1384:
1381:
1348:red supergiant
1285:
1284:Stellar system
1282:
1263:in the 1970s.
1233:
1230:
1180:, abbreviated
1137:
1136:
1131:
1128:
1127:
1122:
1119:
1118:
1113:
1105:
1104:
1100:
1099:
1084:
1083:
1068:
1067:
1059: 132444,
1038:ζ Orionis
1032:
1029:
1028:
1022:
1021:
1018:
1017:
1011:
1003:
1002:
999:
982:
981:
977:
976:
973:
972:
966:
958:
957:
951:
943:
942:
938:
935:
931:
925:
924:
920:
917:
906:
898:
897:
893:
890:
879:
871:
870:
866:
865:
859:
851:
850:
840:
823:
822:
819:
811:
810:
797:
789:
788:
775:
762:
761:
757:
754:
750:
742:
741:
737:
734:
723:
715:
714:
710:
707:
696:
688:
687:
683:
682:
678:
677:
674:
661:
660:
657:
643:
642:
639:
628:
627:
624:
615:
614:
611:
602:
601:
598:
587:
586:
580:
571:
570:
567:
561:
560:
557:
551:
550:
544:
543:
540:
534:
531:Semi-amplitude
527:
526:
523:
517:
513:Semi-amplitude
508:
507:
497:
484:
483:
466:
452:
451:
441:
430:
429:
419:
410:
409:
400:
391:
390:
378:
367:
366:
357:
348:
347:
344:
338:
337:
334:
328:
327:
321:
320:
317:
316:
313:
308:
300:
299:
287:
279:
278:
272:
263:
262:
237:
228:
227:
224:
219:
211:
210:
207:
206:
200:
199:
194:
187:
186:
183:
176:
175:
172:
166:
165:
159:
153:
152:
148:
147:
141:
132:
131:
128:
122:
121:
119:05 40 45.52666
116:
108:
107:
70:
64:
63:
58:
52:
51:
38:
37:
25:
15:
13:
10:
9:
6:
4:
3:
2:
3703:
3692:
3689:
3687:
3686:Gould objects
3684:
3682:
3679:
3677:
3674:
3672:
3669:
3667:
3664:
3662:
3659:
3657:
3656:Bayer objects
3654:
3652:
3649:
3647:
3644:
3642:
3641:B-type giants
3639:
3637:
3634:
3633:
3631:
3621:
3611:
3609:
3604:
3599:
3597:
3587:
3583:
3572:
3562:
3552:
3549:
3548:
3546:
3544:
3540:
3536:
3526:
3523:
3521:
3518:
3516:
3513:
3511:
3508:
3507:
3505:
3501:
3495:
3492:
3490:
3487:
3485:
3482:
3480:
3477:
3475:
3472:
3471:
3469:
3465:
3462:
3460:
3456:
3446:
3443:
3441:
3438:
3436:
3433:
3431:
3428:
3426:
3423:
3421:
3418:
3416:
3413:
3411:
3408:
3406:
3403:
3401:
3398:
3396:
3393:
3391:
3388:
3386:
3383:
3381:
3378:
3376:
3373:
3371:
3368:
3366:
3363:
3362:
3360:
3356:
3350:
3347:
3345:
3342:
3340:
3337:
3335:
3332:
3330:
3327:
3325:
3322:
3320:
3317:
3315:
3312:
3311:
3309:
3305:
3302:
3300:
3296:
3286:
3283:
3281:
3278:
3277:
3275:
3271:
3265:
3262:
3260:
3257:
3255:
3252:
3250:
3247:
3245:
3242:
3240:
3237:
3235:
3232:
3231:
3229:
3227:
3223:
3220:
3218:
3212:
3202:
3199:
3197:
3194:
3192:
3189:
3187:
3184:
3183:
3181:
3179:
3175:
3171:
3161:
3158:
3156:
3153:
3151:
3148:
3146:
3143:
3141:
3138:
3136:
3133:
3131:
3128:
3126:
3123:
3121:
3118:
3116:
3113:
3111:
3108:
3106:
3103:
3101:
3098:
3096:
3093:
3091:
3088:
3086:
3083:
3082:
3080:
3076:
3070:
3067:
3065:
3062:
3060:
3057:
3055:
3052:
3050:
3047:
3045:
3042:
3041:
3039:
3037:
3033:
3027:
3024:
3022:
3019:
3017:
3014:
3012:
3009:
3007:
3004:
3002:
2999:
2997:
2994:
2992:
2989:
2987:
2984:
2982:
2979:
2978:
2976:
2974:
2970:
2964:
2961:
2959:
2956:
2954:
2951:
2949:
2946:
2944:
2941:
2939:
2936:
2934:
2931:
2929:
2926:
2924:
2921:
2919:
2916:
2914:
2911:
2909:
2906:
2904:
2901:
2899:
2896:
2894:
2891:
2889:
2886:
2884:
2881:
2880:
2878:
2876:
2872:
2866:
2863:
2861:
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2856:
2853:
2851:
2848:
2846:
2843:
2841:
2838:
2836:
2833:
2831:
2828:
2826:
2823:
2821:
2818:
2816:
2813:
2811:
2808:
2806:
2803:
2801:
2798:
2796:
2793:
2791:
2788:
2786:
2783:
2781:
2778:
2776:
2773:
2771:
2768:
2766:
2763:
2761:
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2756:
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2728:
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2716:
2713:
2711:
2708:
2706:
2703:
2701:
2698:
2696:
2693:
2691:
2688:
2686:
2683:
2681:
2678:
2677:
2675:
2673:
2669:
2663:
2660:
2658:
2655:
2653:
2650:
2648:
2645:
2643:
2640:
2638:
2635:
2633:
2630:
2628:
2627:
2622:
2620:
2617:
2615:
2612:
2610:
2607:
2605:
2602:
2600:
2597:
2595:
2592:
2590:
2587:
2585:
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2580:
2577:
2575:
2572:
2570:
2567:
2565:
2562:
2560:
2557:
2555:
2552:
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2547:
2545:
2542:
2540:
2537:
2535:
2532:
2528:
2525:
2523:
2520:
2518:
2515:
2513:
2510:
2508:
2505:
2503:
2500:
2498:
2495:
2493:
2490:
2489:
2488:
2485:
2483:
2482:
2477:
2475:
2472:
2470:
2467:
2465:
2462:
2460:
2459:γ (Bellatrix)
2457:
2455:
2452:
2450:
2447:
2446:
2444:
2442:
2438:
2435:
2433:
2429:
2423:
2422:Orion's Sword
2420:
2418:
2415:
2413:
2410:
2408:
2405:
2403:
2400:
2399:
2396:
2392:
2385:
2380:
2378:
2373:
2371:
2366:
2365:
2362:
2356:
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2336:
2332:
2328:
2324:
2320:
2316:
2314:
2312:
2309:
2299:
2295:
2291:
2290:
2286:
2280:
2276:
2273:
2265:
2262:
2258:
2254:
2250:
2242:
2239:
2227:
2221:
2218:
2203:
2197:
2194:
2182:
2176:
2173:
2167:
2162:
2158:
2154:
2150:
2146:
2142:
2135:
2133:
2129:
2124:
2123:
2115:
2113:
2111:
2107:
2102:
2098:
2094:
2090:
2086:
2082:
2077:
2072:
2068:
2064:
2057:
2054:
2049:
2045:
2040:
2035:
2031:
2027:
2020:
2017:
2012:
2008:
2004:
2000:
1996:
1992:
1987:
1982:
1978:
1974:
1967:
1964:
1959:
1953:
1950:
1945:
1941:
1937:
1933:
1929:
1925:
1921:
1917:
1912:
1907:
1903:
1899:
1891:
1888:
1883:
1879:
1874:
1869:
1865:
1861:
1857:
1853:
1849:
1842:
1839:
1834:
1830:
1826:
1822:
1818:
1814:
1809:
1804:
1800:
1796:
1789:
1787:
1785:
1783:
1781:
1779:
1777:
1775:
1773:
1771:
1769:
1767:
1765:
1763:
1761:
1759:
1757:
1755:
1751:
1746:
1742:
1738:
1734:
1727:
1725:
1721:
1716:
1712:
1708:
1704:
1700:
1696:
1691:
1686:
1682:
1678:
1671:
1669:
1667:
1665:
1663:
1659:
1654:
1648:
1644:
1637:
1634:
1628:
1624:
1621:
1620:
1616:
1614:
1612:
1610:
1606:
1602:
1601:
1591:
1589:
1587:
1578:
1567:
1563:
1559:
1555:
1551:
1547:
1543:
1539:
1534:
1523:
1518:
1516:
1512:
1508:
1504:
1498:
1490:
1482:
1478:
1473:
1471:
1467:
1463:
1459:
1455:
1451:
1445:
1435:
1433:
1429:
1425:
1421:
1417:
1413:
1408:
1406:
1402:
1398:
1394:
1390:
1382:
1380:
1378:
1373:
1370:
1368:
1363:
1361:
1357:
1353:
1349:
1345:
1341:
1337:
1333:
1329:
1325:
1321:
1317:
1313:
1312:spectral type
1309:
1304:
1301:
1299:
1290:
1283:
1281:
1279:
1275:
1274:
1269:
1264:
1262:
1258:
1254:
1250:
1242:
1238:
1231:
1229:
1228:association.
1227:
1223:
1218:
1214:
1210:
1205:
1203:
1199:
1195:
1191:
1187:
1183:
1179:
1175:
1171:
1167:
1163:
1159:
1155:
1151:
1150:constellation
1147:
1143:
1135:
1132:
1130:
1129:
1126:
1123:
1121:
1120:
1117:
1114:
1112:
1111:
1107:
1106:
1101:
1097:
1094: 37743,
1093:
1089:
1085:
1081:
1078: 37742,
1077:
1073:
1069:
1063:
1058:
1055: 26727,
1054:
1048:
1043:
1039:
1035:
1030:
1027:
1023:
1019:
1016:
1012:
1010:
1009:
1005:
1004:
1001:350 km/s
1000:
998:
996:
992:
988:
984:
983:
978:
974:
971:
967:
965:
964:
960:
959:
956:
952:
950:
949:
945:
944:
941:
932:
930:
927:
926:
923:
907:
905:
904:
900:
899:
896:
880:
878:
877:
873:
872:
867:
864:
860:
858:
857:
853:
852:
841:
839:
837:
833:
829:
825:
824:
820:
818:
817:
813:
812:
809:
798:
796:
795:
791:
790:
787:
776:
774:
772:
768:
764:
763:
760:
752:250,000
751:
749:
748:
744:
743:
740:
724:
722:
721:
717:
716:
713:
697:
695:
694:
690:
689:
684:
679:
675:
670:
668:
663:
662:
658:
655:
653:
650:
645:
644:
640:
637:
635:
630:
629:
625:
623:
621:
617:
616:
612:
610:
608:
604:
603:
599:
596:
594:
589:
588:
585:
581:
579:
577:
573:
572:
568:
566:
563:
562:
558:
556:
553:
552:
549:
545:
541:
532:
529:
528:
524:
515:
514:
510:
509:
498:
493:
491:
486:
485:
467:
464:
462:
459:
454:
453:
442:
439:
437:
432:
431:
420:
418:
416:
412:
411:
401:
399:
397:
393:
392:
388:
379:
376:
374:
369:
368:
358:
356:
354:
350:
349:
345:
343:
340:
339:
335:
333:
330:
329:
326:
322:
318:
314:
312:
306:
302:
301:
297:
292:
288:
286:
285:
281:
280:
277:
273:
271:
269:
265:
264:
261:
257:
249:
245:
238:
236:
234:
233:Proper motion
230:
229:
225:
223:
217:
213:
212:
208:
205:
201:
195:
193:
189:
188:
184:
182:
178:
177:
173:
171:
168:
167:
163:
160:
158:
155:
154:
149:
142:
138:
134:
133:
129:
127:
124:
123:
117:
114:
110:
109:
103:
71:
69:
68:Pronunciation
66:
65:
62:
59:
57:
56:Constellation
54:
53:
49:
45:
39:
35:
29:
23:
3525:TXS 0506+056
3520:II Zwicky 28
3445:Orion Nebula
3385:Flame Nebula
2625:
2480:
2473:
2417:Orion's Belt
2301:. Retrieved
2297:
2269:(in Chinese)
2264:
2248:
2246:(in Chinese)
2241:
2229:. Retrieved
2220:
2208:. Retrieved
2196:
2184:. Retrieved
2175:
2148:
2144:
2121:
2066:
2062:
2056:
2029:
2025:
2019:
1976:
1972:
1966:
1952:
1901:
1897:
1890:
1855:
1851:
1841:
1798:
1794:
1736:
1732:
1680:
1676:
1642:
1636:
1623:Flame Nebula
1608:
1599:
1595:
1566:Chinese name
1519:
1500:
1474:
1465:
1461:
1457:
1453:
1447:
1444:Orion's Belt
1438:Orion's Belt
1431:
1426:organized a
1419:
1411:
1409:
1400:
1393:Zeta Orionis
1392:
1386:
1374:
1371:
1364:
1328:than the Sun
1305:
1302:
1295:
1271:
1265:
1249:Orion's Belt
1246:
1241:Orion's Belt
1226:Collinder 70
1207:The primary
1206:
1194:Orion's Belt
1181:
1177:
1173:
1169:
1166:Zeta Orionis
1165:
1157:
1144:is a triple
1141:
1140:
1108:
1087:
1071:
1006:
994:
990:
985:
961:
953:29,000
946:
933:32,000
928:
901:
874:
854:
835:
831:
826:
814:
792:
770:
765:
745:
718:
691:
665:
647:
632:
618:
607:Eccentricity
605:
591:
574:
564:
554:
530:
511:
488:
456:
434:
413:
396:Eccentricity
394:
371:
351:
341:
331:
303:
282:
266:
231:
214:
34:Flame Nebula
3620:Outer space
3201:HD 290327 b
3085:4U 0614+091
2474:ζ (Alnitak)
2469:ε (Alnilam)
2464:δ (Mintaka)
2317:Alnitak on
2294:"Alnitak 3"
1586:White Tiger
1580:, English:
1577:Shēn Xiù yī
1538:Three Stars
1536:), meaning
1515:White Tiger
1477:Three Stars
1387:ζ Orionis (
1298:star system
1196:along with
1160:, which is
1146:star system
1064:J05407-0157
1034:126 G.
948:Temperature
794:Temperature
673:(secondary)
641:155.5°
620:Inclination
539:(secondary)
496:(secondary)
415:Inclination
192:color index
181:color index
126:Declination
3630:Categories
3551:GRB 991216
3515:CGCG 396-2
3440:Messier 78
3435:Messier 43
3375:Barnard 30
3196:HD 38529 b
3191:HD 37605 b
3186:HD 34445 b
3178:Exoplanets
3120:Gliese 221
3115:Gliese 208
3110:Gliese 205
3105:Gliese 179
3095:GRB 991216
2549:λ (Meissa)
2539:ι (Hatysa)
2481:(Algjebba)
2347:Astrophoto
2339:Hydrogen α
2303:2005-12-15
2298:SolStation
2076:1509.02773
2039:1610.05625
1979:(2): 513.
1629:References
1550:Betelgeuse
1401:50 Orionis
1360:black hole
1324:as the Sun
1308:supergiant
1178:50 Orionis
1098: 1949
1082: 1948
929:Luminosity
869:Alnitak Ab
849: km/s
769:(log
747:Luminosity
686:Alnitak Aa
676:47.3°
649:Periastron
626:72.0°
458:Periastron
364:7.0 d
204:Astrometry
198:−0.20 (B)
3596:Astronomy
3510:4C +09.17
2672:Flamsteed
2589:π (Tabit)
2544:κ (Saiph)
2454:β (Rigel)
1986:0803.0873
1944:119323941
1936:0004-6337
1911:0705.0878
1882:0004-6361
1808:1306.0330
1690:0708.1752
1605:U.S. Navy
1592:Namesakes
1554:Bellatrix
1479:mansion (
1389:Latinised
1356:supernova
1344:night sky
1336:luminance
1330:, with a
1273:Hipparcos
1188:from the
1162:Latinised
1158:ζ Orionis
980:Alnitak B
968:7.2
861:6.4
821:6.67 days
565:Companion
542:19.6 km/s
525:10.1 km/s
522:(primary)
385:0.2
342:Companion
196:−0.11 (A)
139: (V)
3571:Category
3459:Galaxies
3425:LDN 1641
3395:HH 24-26
3370:Abell 13
3365:Abell 12
3217:clusters
3150:S Ori 70
3145:S Ori 52
3135:LP 658-2
3130:HOPS 383
2875:Variable
2626:(Thabit)
2275:Archived
2101:62800990
2069:: A110.
2011:17601299
1833:53645495
1715:18759600
1617:See also
1533:Shēn Xiù
1502:Shēn Xiù
1462:Al Alkāt
1458:Al Nasak
1454:Al Nijād
1420:an-niṭāq
1367:subgiant
1224:and the
1170:Zeta Ori
1049:−02°1338
1013:~7
939:☉
921:☉
894:☉
816:Rotation
758:☉
738:☉
711:☉
582:1,508.6
307: (M
284:Distance
268:Parallax
20:Alnitak
3582:Portals
3420:IC 2118
3299:Nebulae
3140:PDS 110
3125:GJ 3379
3100:G 99-47
3090:CVSO 30
2351:Sky Map
2319:WikiSky
2231:28 July
2210:28 July
2153:Bibcode
2081:Bibcode
2044:Bibcode
2032:: 101.
1991:Bibcode
1916:Bibcode
1860:Bibcode
1813:Bibcode
1801:: A52.
1741:Bibcode
1695:Bibcode
1600:Alnitah
1546:Mintaka
1542:Alnilam
1522:Chinese
1509:of the
1432:Alnitak
1418:النطاق
1412:Alnitak
1352:Jupiter
1342:in the
1340:class O
1278:parsecs
1217:class O
1202:Mintaka
1198:Alnilam
1186:parsecs
1148:in the
1142:Alnitak
681:Details
659:2,070.6
555:Primary
360:2,687.3
332:Primary
48:Equinox
3415:IC 434
3405:HH 111
3390:HH 1/2
3069:290327
2865:75 (l)
2860:74 (k)
2850:72 (f)
2840:69 (f)
2785:51 (b)
2780:49 (d)
2770:42 (c)
2750:32 (A)
2740:29 (e)
2735:27 (p)
2730:23 (m)
2725:22 (o)
2710:16 (h)
2700:14 (i)
2255:
2249:中國星座神話
2186:22 May
2099:
2009:
1942:
1934:
1880:
1831:
1713:
1649:
1609:Crater
1603:was a
1499::
1497:pinyin
1491::
1483::
1450:Arabic
1416:Arabic
1377:IC 434
1182:50 Ori
1176:, and
1110:SIMBAD
915:
903:Radius
888:
806:
800:29,500
784:
732:
720:Radius
705:
600:2.728″
576:Period
506:°
450:°
428:°
353:Period
185:−1.06
50:J2000
3608:Stars
3503:Other
3400:HH 34
3358:Other
3273:Other
3078:Other
3064:42618
3059:37605
3054:37320
3049:34445
3044:33636
2963:V2384
2958:V2254
2953:V1352
2948:V1201
2943:V1005
2685:6 (g)
2441:Bayer
2432:Stars
2343:X-Ray
2331:GALEX
2205:(PDF)
2097:S2CID
2071:arXiv
2034:arXiv
2007:S2CID
1981:arXiv
1940:S2CID
1906:arXiv
1829:S2CID
1803:arXiv
1739:: 0.
1711:S2CID
1685:arXiv
1562:Rigel
1558:Saiph
1174:ζ Ori
1154:Orion
804:1,000
652:epoch
548:Orbit
500:204.2
461:epoch
422:139.3
407:0.004
403:0.338
325:Orbit
252:Dec.:
164:(Aa)
143:1.77
61:Orion
44:Epoch
3494:2119
3489:2110
3484:1924
3479:1819
3474:1683
3349:2174
3344:2071
3339:2067
3334:2064
3329:2023
3324:2022
3319:1999
3314:1788
3264:2202
3259:2194
3254:2175
3249:2169
3244:1981
3239:1980
3234:1662
3215:Star
3026:2275
3021:2251
3016:2024
3011:2007
3006:1988
3001:1952
2996:1887
2991:1874
2986:1763
2981:1759
2938:V883
2933:V380
2335:IRAS
2327:SDSS
2323:DSS2
2253:ISBN
2233:2016
2212:2016
2188:2016
1932:ISSN
1878:ISSN
1737:2237
1647:ISBN
1598:USS
1596:The
1560:and
1544:and
1403:its
1399:and
1266:The
1209:star
1200:and
876:Mass
726:20.0
693:Mass
613:0.07
444:83.8
381:35.9
190:B−V
179:U−B
3467:NGC
3307:NGC
3226:NGC
2161:doi
2149:540
2089:doi
2067:582
1999:doi
1977:478
1924:doi
1902:328
1868:doi
1856:384
1821:doi
1799:554
1703:doi
1681:474
1571:參宿一
1520:In
1391:as
1310:of
1190:Sun
1172:or
1164:to
1152:of
1062:WDS
1057:SAO
1053:HIP
1015:Myr
1008:Age
970:Myr
963:Age
913:1.0
909:7.3
863:Myr
856:Age
843:110
786:cgs
782:0.1
778:3.2
730:3.2
669:(ω)
654:(T)
636:(Ω)
622:(i)
609:(e)
595:(a)
578:(P)
504:1.2
492:(ω)
481:9.0
475:734
472:452
468:JD
463:(T)
448:0.8
438:(Ω)
426:0.6
417:(i)
398:(e)
387:mas
375:(a)
355:(P)
276:mas
270:(π)
256:mas
244:mas
240:RA:
235:(μ)
3632::
3036:HD
2973:HR
2928:GW
2923:FU
2918:DN
2913:BM
2908:BF
2903:VV
2898:UX
2855:73
2845:71
2835:68
2830:66
2825:64
2820:63
2815:60
2810:59
2805:57
2800:56
2795:55
2790:52
2775:45
2765:38
2760:35
2755:33
2745:31
2720:21
2715:18
2705:15
2695:13
2690:11
2624:υ
2479:η
2353:,
2349:,
2345:,
2341:,
2337:,
2333:,
2329:,
2325:,
2321::
2296:.
2159:.
2147:.
2143:.
2131:^
2109:^
2095:.
2087:.
2079:.
2065:.
2042:.
2028:.
2005:.
1997:.
1989:.
1975:.
1938:.
1930:.
1922:.
1914:.
1900:.
1876:.
1866:.
1854:.
1850:.
1827:.
1819:.
1811:.
1797:.
1753:^
1735:.
1723:^
1709:.
1701:.
1693:.
1679:.
1661:^
1588:.
1556:,
1552:,
1527:參宿
1524:,
1517:.
1495:;
1493:參宿
1487:;
1485:参宿
1407:.
1379:.
1362:.
1204:.
1116:AB
1096:HR
1092:HD
1090::
1080:HR
1076:HD
1074::
1051:,
1047:BD
1044:,
1040:,
882:14
847:10
703:10
699:33
584:yr
533:(K
516:(K
477:.2
346:Ab
336:Aa
296:pc
291:ly
260:yr
248:yr
218:(R
106:,
90:aɪ
3584::
2893:W
2888:U
2883:S
2680:5
2662:ω
2657:ψ
2652:ψ
2647:χ
2642:χ
2637:φ
2632:φ
2619:τ
2614:σ
2609:ρ
2604:π
2599:π
2594:π
2584:π
2579:π
2574:ο
2569:ο
2564:ξ
2559:ν
2554:μ
2534:θ
2527:H
2522:G
2517:F
2512:E
2507:D
2502:C
2497:B
2492:A
2487:θ
2383:e
2376:t
2369:v
2306:.
2259:.
2235:.
2214:.
2190:.
2169:.
2163::
2155::
2103:.
2091::
2083::
2073::
2050:.
2046::
2036::
2030:5
2013:.
2001::
1993::
1983::
1946:.
1926::
1918::
1908::
1884:.
1870::
1862::
1835:.
1823::
1815::
1805::
1747:.
1743::
1717:.
1705::
1697::
1687::
1655:.
1574:(
1530:(
1334:(
1134:B
1125:A
1088:B
1072:A
997:)
995:i
991:v
989:(
955:K
936:L
918:R
911:±
891:M
886:3
884:±
845:±
838:)
836:i
832:v
830:(
808:K
802:±
780:±
773:)
771:g
755:L
735:R
728:±
708:M
701:±
569:B
559:A
537:)
535:2
520:)
518:1
502:±
479:±
470:2
446:±
424:±
405:±
383:±
362:±
311:)
309:V
298:)
258:/
246:/
222:)
220:v
102:/
99:k
96:æ
93:t
87:n
84:ˈ
81:l
78:æ
75:/
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