Knowledge (XXG)

Cygnus OB2-12

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731:, luminosity, and spectrum all classify it as an LBV. It shows brightness variations of a few tenths of a magnitude, but these do not seem to be associated with colour changes that would be expected from an LBV. The spectral type has varied slightly since its discovery, but not to the extent that would be normal for an LBV. If the lower Gaia DR2 distance were correct then the properties of Cygnus OB2 #12 would mean it would be expected to pulsate at low amplitude with a period of a few days. 552: 640:, which was inconsistent with the distance of other Cygnus OB2 members. However, the result included a significant amount of noise suggesting that it may have been inaccurate. Earlier measures of the parallax were too imprecise to be meaningful. If the closer distance were accepted then the star would be a more conventional blue supergiant with a luminosity around 440,000  54: 709: 47: 586:) away in Cygnus, and resides in a region of the Milky Way from which visible light is heavily absorbed by interstellar dust when viewed from Earth. The dust causes the star to be strongly reddened despite being an intrinsically hot and blue star, hence it has been extensively studied in the infra-red. Were it not for the dust 536:. This makes the star nearly two million times more luminous than the Sun, although estimates were even higher when the star was first discovered. It is now known to be a binary, with the companion approximately a tenth as bright. A very approximate initial estimate of the orbit gives the total system mass as 120  956:
Cutri, Roc M.; Skrutskie, Michael F.; Van Dyk, Schuyler D.; Beichman, Charles A.; Carpenter, John M.; Chester, Thomas; Cambresy, Laurent; Evans, Tracey E.; Fowler, John W.; Gizis, John E.; Howard, Elizabeth V.; Huchra, John P.; Jarrett, Thomas H.; Kopan, Eugene L.; Kirkpatrick, J. Davy; Light, Robert
850:; Herrero, A.; Jao, W.-C.; Mason, B. D.; Massey, P.; Moffat, A. F. J.; Walborn, N. R. (2014). "A High Angular Resolution Survey of Massive Stars in Cygnus OB2: Results from the Hubble Space Telescope Fine Guidance Sensors". 2152: 3474: 3157: 957:
M.; Marsh, Kenneth A.; McCallon, Howard L.; Schneider, Stephen E.; Stiening, Rae; Sykes, Matthew J.; Weinberg, Martin D.; Wheaton, William A.; Wheelock, Sherry L.; Zacarias, N. (2003).
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B star in a 100–200 year orbit. It is 2.3 magnitudes fainter than the primary star and 0.063" away. The other is 4.8 magnitudes fainter and about an arc-second distant. No
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There are several fainter stars around Cygnus OB2 #12, thought to comprise a small cluster. Two stars are only resolved by speckle interferometry. One is thought to be a
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Chentsov, E. L.; Klochkova, V. G.; Panchuk, V. E.; Yushkin, M. V.; Nasonov, D. S. (2013). "Spectroscopy of 13 high-mass stars in the Cyg OB2 association".
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Clark, J. S.; Najarro, F.; Negueruela, I.; Ritchie, B. W.; Urbaneja, M. A.; Howarth, I. D. (2012). "On the nature of the galactic early-B hypergiants".
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Nazé, Yaël; Rauw, Gregor; Czesla, Stefan; Mahy, Laurent; Campos, Fran (2019). "Variations on a theme: The puzzling behaviour of Schulte 12".
1503: 1048:"On the Binary Nature of Massive Blue Hypergiants: High-resolution X-Ray Spectroscopy Suggests That Cyg OB2 12 is a Colliding Wind Binary" 675:
However using the distance provided by Gaia EDR3 it was determined in one work that the star has a luminosity of only about 316,000 
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Klochkova, V. G.; Islentieva, E. S.; Panchuk, V. E. (2023-01-01). "On the status of the star Schulte 12 in the association Cyg OB2".
672:, more consistent with estimates of the distance to Cygnus OB2, although there is still a significant amount of astrometric noise. 1167:
Maryeva, O. V.; Chentsov, E. L.; Goranskij, V. P.; Dyachenko, V. V.; Karpov, S. V.; Malogolovets, E. V.; Rastegaev, D. A. (2016).
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Oskinova, L. M.; Huenemoerder, D. P.; Hamann, W. -R.; Shenar, T.; Sander, A. A. C.; Ignace, R.; Todt, H.; Hainich, R. (2017).
712: 3537: 594:(Alpha Cygni), but because of the dust the observed visual magnitude is 11.4 so that it requires binoculars or a small 3527: 529: 3517: 740: 1885: 988:
Klochkova, V. G.; Chentsov, E. L. (2004). "The Optical Spectrum of an LBV Candidate in the Cyg OB2 Association".
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emission suggests that there may be a hot luminous companion in a close orbit, with their
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Berlanas, S. R.; Wright, N. J.; Herrero, A.; Drew, J. E.; Lennon, D. J. (2019).
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Size comparison of supergiant and hypergiant stars, including Cygnus OB2 #12,
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Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction".
830: 636: 583: 503: 434: 387: 328: 1286:"Disentangling the spatial substructure of Cygnus OB2 from Gaia DR2" 846:
Caballero-Nieves, S. M.; Nelan, E. P.; Gies, D. R.; Wallace, D. J.;
1402: 1302: 1245: 1185: 1064: 936: 911: 793: 2979: 2893: 2849: 2654: 1557: 1431: 1357: 1128: 864: 707: 614: 591: 550: 476: 3275: 2775: 1540: 292: 280: 229: 1492: 2365: 2320: 1169:"On the nature of high reddening of Cygnus OB2 #12 hypergiant" 689:, and a mass much lower than the currently accepted ~110  777:
Data Release 3. Summary of the content and survey properties"
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Cygnus OB2 #12 is generally assumed to be a member of the
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Vallenari, A.; et al. (Gaia collaboration) (2023).
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parallax for Cygnus OB2 #12 indicated a distance around
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http://jumk.de/astronomie/big-stars/cygnus-ob2-12.shtml
528:(all electromagnetic radiation) of −10.9, among the 3473: 3464: 3409: 3156: 3147: 3112: 3084: 3075: 3046: 3028: 2945: 2902: 2869: 2860: 2833: 2761: 2733: 2722: 2557: 2489: 2151: 2123: 2080: 2047: 1884: 1716: 1548: 1539: 1290:Monthly Notices of the Royal Astronomical Society 1173:Monthly Notices of the Royal Astronomical Society 696:. This would put the star’s luminosity below the 668:is more precise and indicates a distance around 578:, a cluster of young massive stars about 4,600 1504: 8: 963:CDS/ADC Collection of Electronic Catalogues 114:41° 14′ 29.279″ 3470: 3153: 3081: 2866: 2730: 1545: 1511: 1497: 1489: 1226: 1224: 1222: 1041: 1039: 1037: 1430: 1401: 1356: 1319: 1301: 1244: 1202: 1184: 1127: 1081: 1063: 1001: 935: 863: 810: 792: 74:J2000       1109: 1107: 1105: 1103: 1101: 951: 949: 947: 752: 272: 905: 903: 901: 899: 33: 1474:Online Astronomy: The Brightest Stars 766: 764: 762: 760: 758: 756: 19:The correct title of this article is 7: 841: 839: 63:Location of Cygnus OB2 #12 (circled) 609:companion could be detected in the 284: 14: 654:, and a current mass of 25  52: 45: 827:Gaia DR3 record for this source 307:0.5895 ± 0.0518  912:"Catalog of Galactic OB Stars" 723:Cygnus OB2 #12 is a candidate 520:is an extremely luminous blue 1: 682:, a radius of about 100  1116:Astronomy & Astrophysics 543:and the period as 30 years. 1263:10.1051/0004-6361/201935141 1146:10.1051/0004-6361/201117472 812:10.1051/0004-6361/202243940 727:(LBV). Its position in the 3554: 1375:10.1051/0004-6361:20078357 1345:Astronomy and Astrophysics 1233:Astronomy and Astrophysics 882:10.1088/0004-6256/147/2/40 781:Astronomy and Astrophysics 741:List of most massive stars 491: 2067782734461462912 18: 1526: 1449:10.1134/S1063772913070019 1052:The Astrophysical Journal 910:Reed, B. Cameron (2003). 530:most luminous stars known 496: 479: J20324096+4114291, 466: 459: 455: 361: 356: 352: 242: 235: 131: 68: 39: 1083:10.3847/1538-4357/aa7e79 916:The Astronomical Journal 852:The Astronomical Journal 698:Humphreys-Davidson limit 613:. However, analysis of 3523:Luminous blue variables 1531:List of stars in Cygnus 1520:Constellation of Cygnus 1367:2007A&A...474..653V 1255:2019A&A...627A..99N 1138:2012A&A...541A.145C 803:2023A&A...674A...1G 719:image of Cygnus OB2 #12 647:, a radius of 118  338:Absolute magnitude 192:Apparent magnitude 181:Apparent magnitude 170:Apparent magnitude 159:Apparent magnitude 121:Apparent magnitude 3513:Cygnus (constellation) 3135:ZTF J203349.8+322901.1 725:luminous blue variable 720: 571: 29:technical restrictions 23:. The omission of the 711: 621:creating the x-rays. 554: 2917:North America Nebula 1479:Tim Thompson: OB2-12 1321:10.1093/mnras/stz117 1204:10.1093/mnras/stw385 848:Degioia-Eastwood, K. 526:bolometric magnitude 16:Blue hypergiant star 3538:Suspected variables 1441:2013ARep...57..527C 1312:2019MNRAS.484.1838B 1195:2016MNRAS.458..491M 1074:2017ApJ...845...39O 1012:2004ARep...48.1005K 975:2003yCat.2246....0C 928:2003AJ....125.2531R 874:2014AJ....147...40C 666:Gaia Data Release 3 631:Gaia Data Release 2 576:Cyg OB2 Association 497:Database references 36: 3528:B-type hypergiants 3020:Soap Bubble Nebula 721: 572: 461:Other designations 327:(1,700 ± 100  287: −3.412  275: −1.703  225:Variable type 148:Apparent magnitude 138:Spectral type 34: 3518:Hipparcos objects 3500: 3499: 3496: 3495: 3460: 3459: 3143: 3142: 3071: 3070: 3064: 2853: 2829: 2828: 2718: 2717: 1419:Astronomy Reports 1020:10.1134/1.1836024 996:(12): 1005–1018. 990:Astronomy Reports 524:with an absolute 515: 514: 322:5,500 ± 500  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1166: 1165: 1161: 1113: 1112: 1099: 1045: 1044: 1035: 987: 986: 982: 955: 954: 945: 909: 908: 897: 845: 844: 837: 770: 769: 754: 749: 737: 706: 695: 692: 688: 685: 681: 678: 669: 660: 657: 653: 650: 646: 643: 634: 627: 619:colliding winds 549: 542: 539: 492: 420: 417: 413:1,660,000  400: 397: 380: 377: 343: 326: 283: 254: 249:Radial velocity 119: 102: 97:Right ascension 95: 70: 64: 62: 61: 60: 59: 58: 57: 35:Cygnus OB2 #12 32: 17: 12: 11: 5: 3551: 3549: 3541: 3540: 3535: 3530: 3525: 3520: 3515: 3505: 3504: 3498: 3497: 3494: 3493: 3491: 3490: 3485: 3479: 3477: 3468: 3462: 3461: 3458: 3457: 3455: 3454: 3449: 3444: 3439: 3434: 3429: 3424: 3419: 3413: 3411: 3407: 3406: 3404: 3403: 3398: 3393: 3388: 3383: 3378: 3373: 3368: 3363: 3358: 3353: 3348: 3343: 3338: 3333: 3328: 3323: 3318: 3313: 3308: 3303: 3298: 3293: 3288: 3283: 3278: 3273: 3268: 3263: 3258: 3253: 3248: 3243: 3238: 3233: 3228: 3223: 3218: 3213: 3208: 3203: 3198: 3193: 3188: 3183: 3178: 3173: 3168: 3162: 3160: 3151: 3145: 3144: 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296: 295: 270: 261: 260: 257: 252: 244: 243: 240: 239: 233: 232: 227: 221: 220: 217: 210: 209: 206: 199: 198: 195: 188: 187: 184: 177: 176: 173: 166: 165: 162: 155: 154: 151: 144: 143: 140: 134: 133: 129: 128: 125: 116: 115: 112: 106: 105: 100: 92: 91: 86: 80: 79: 66: 65: 51: 50: 44: 43: 42: 41: 40: 21:Cygnus OB2 #12 15: 13: 10: 9: 6: 4: 3: 2: 3550: 3539: 3536: 3534: 3533:2MASS objects 3531: 3529: 3526: 3524: 3521: 3519: 3516: 3514: 3511: 3510: 3508: 3489: 3486: 3484: 3481: 3480: 3478: 3476: 3472: 3469: 3467: 3463: 3453: 3450: 3448: 3445: 3443: 3440: 3438: 3435: 3433: 3430: 3428: 3425: 3423: 3420: 3418: 3415: 3414: 3412: 3408: 3402: 3399: 3397: 3394: 3392: 3389: 3387: 3384: 3382: 3379: 3377: 3374: 3372: 3369: 3367: 3364: 3362: 3359: 3357: 3354: 3352: 3349: 3347: 3344: 3342: 3339: 3337: 3334: 3332: 3329: 3327: 3324: 3322: 3319: 3317: 3314: 3312: 3309: 3307: 3304: 3302: 3299: 3297: 3294: 3292: 3289: 3287: 3284: 3282: 3279: 3277: 3274: 3272: 3269: 3267: 3264: 3262: 3259: 3257: 3254: 3252: 3249: 3247: 3244: 3242: 3239: 3237: 3234: 3232: 3229: 3227: 3224: 3222: 3219: 3217: 3214: 3212: 3209: 3207: 3204: 3202: 3199: 3197: 3194: 3192: 3189: 3187: 3184: 3182: 3179: 3177: 3174: 3172: 3169: 3167: 3164: 3163: 3161: 3159: 3155: 3152: 3150: 3146: 3136: 3133: 3131: 3128: 3126: 3123: 3121: 3118: 3117: 3115: 3111: 3105: 3102: 3100: 3097: 3095: 3092: 3091: 3089: 3087: 3083: 3080: 3078: 3074: 3062: 3057: 3054: 3053: 3051: 3049: 3045: 3039: 3036: 3035: 3033: 3031: 3027: 3021: 3018: 3016: 3013: 3011: 3008: 3006: 3003: 3001: 2998: 2996: 2993: 2991: 2988: 2986: 2983: 2981: 2978: 2976: 2975:Kronberger 61 2973: 2971: 2968: 2966: 2963: 2961: 2958: 2956: 2953: 2952: 2950: 2948: 2944: 2938: 2935: 2933: 2930: 2928: 2925: 2923: 2920: 2918: 2915: 2913: 2910: 2909: 2907: 2905: 2901: 2895: 2892: 2890: 2887: 2885: 2882: 2880: 2877: 2876: 2874: 2872: 2868: 2865: 2863: 2859: 2851: 2846: 2843: 2842: 2840: 2838: 2832: 2822: 2819: 2817: 2814: 2812: 2809: 2807: 2804: 2802: 2799: 2797: 2794: 2792: 2789: 2787: 2784: 2782: 2779: 2777: 2774: 2772: 2769: 2768: 2766: 2764: 2760: 2754: 2751: 2749: 2746: 2744: 2741: 2740: 2738: 2736: 2732: 2729: 2727: 2721: 2711: 2708: 2706: 2703: 2701: 2698: 2696: 2693: 2691: 2688: 2686: 2683: 2681: 2678: 2676: 2673: 2671: 2668: 2666: 2663: 2661: 2658: 2656: 2653: 2651: 2648: 2646: 2643: 2641: 2638: 2636: 2633: 2631: 2628: 2626: 2623: 2621: 2618: 2616: 2613: 2611: 2608: 2606: 2603: 2601: 2598: 2596: 2593: 2591: 2588: 2586: 2583: 2581: 2578: 2576: 2573: 2571: 2568: 2566: 2563: 2562: 2560: 2556: 2550: 2547: 2545: 2542: 2540: 2537: 2535: 2532: 2530: 2527: 2525: 2522: 2520: 2517: 2515: 2512: 2510: 2507: 2505: 2502: 2500: 2497: 2496: 2494: 2492: 2488: 2482: 2479: 2477: 2474: 2472: 2469: 2467: 2464: 2462: 2459: 2457: 2454: 2452: 2449: 2447: 2444: 2442: 2439: 2437: 2434: 2432: 2429: 2427: 2424: 2422: 2419: 2417: 2414: 2412: 2409: 2407: 2404: 2402: 2399: 2397: 2394: 2392: 2389: 2387: 2384: 2382: 2379: 2377: 2374: 2372: 2369: 2367: 2364: 2362: 2359: 2357: 2354: 2352: 2349: 2347: 2344: 2342: 2339: 2337: 2334: 2332: 2329: 2327: 2324: 2322: 2319: 2317: 2314: 2312: 2309: 2307: 2304: 2302: 2299: 2297: 2294: 2292: 2289: 2287: 2284: 2282: 2279: 2277: 2274: 2272: 2269: 2267: 2264: 2262: 2259: 2257: 2254: 2252: 2249: 2247: 2244: 2242: 2239: 2237: 2234: 2232: 2229: 2227: 2224: 2222: 2219: 2217: 2214: 2212: 2209: 2207: 2204: 2202: 2199: 2197: 2194: 2192: 2189: 2187: 2184: 2182: 2179: 2177: 2174: 2172: 2169: 2167: 2164: 2162: 2159: 2158: 2156: 2154: 2150: 2144: 2141: 2139: 2136: 2134: 2131: 2130: 2128: 2126: 2122: 2116: 2113: 2111: 2108: 2106: 2103: 2101: 2098: 2096: 2093: 2091: 2088: 2087: 2085: 2083: 2079: 2073: 2070: 2068: 2065: 2063: 2060: 2058: 2055: 2054: 2052: 2050: 2046: 2040: 2037: 2035: 2032: 2030: 2027: 2025: 2022: 2020: 2017: 2015: 2012: 2010: 2007: 2005: 2002: 2000: 1997: 1995: 1992: 1990: 1987: 1985: 1982: 1980: 1977: 1975: 1972: 1970: 1967: 1965: 1962: 1960: 1957: 1955: 1952: 1950: 1947: 1945: 1942: 1940: 1937: 1935: 1932: 1930: 1927: 1925: 1922: 1920: 1917: 1915: 1912: 1910: 1907: 1905: 1902: 1900: 1897: 1895: 1892: 1891: 1889: 1887: 1883: 1877: 1874: 1872: 1869: 1867: 1864: 1862: 1859: 1857: 1854: 1852: 1849: 1847: 1844: 1842: 1839: 1837: 1834: 1832: 1829: 1827: 1824: 1822: 1819: 1817: 1814: 1812: 1809: 1807: 1804: 1802: 1799: 1797: 1794: 1792: 1789: 1787: 1784: 1782: 1779: 1777: 1774: 1772: 1769: 1767: 1764: 1762: 1759: 1757: 1754: 1752: 1749: 1747: 1744: 1742: 1739: 1737: 1734: 1732: 1729: 1727: 1724: 1723: 1721: 1719: 1715: 1709: 1706: 1704: 1701: 1699: 1696: 1694: 1691: 1689: 1686: 1684: 1681: 1679: 1676: 1674: 1671: 1669: 1666: 1664: 1661: 1659: 1656: 1654: 1651: 1649: 1646: 1644: 1641: 1639: 1636: 1634: 1631: 1629: 1626: 1624: 1621: 1619: 1616: 1614: 1611: 1609: 1606: 1604: 1601: 1599: 1596: 1594: 1591: 1589: 1586: 1584: 1581: 1579: 1576: 1574: 1571: 1569: 1566: 1564: 1561: 1559: 1556: 1555: 1553: 1551: 1547: 1544: 1542: 1538: 1532: 1529: 1528: 1525: 1521: 1514: 1509: 1507: 1502: 1500: 1495: 1494: 1491: 1485: 1482: 1480: 1477: 1475: 1472: 1471: 1467: 1458: 1454: 1450: 1446: 1442: 1438: 1433: 1428: 1424: 1420: 1413: 1410: 1404: 1399: 1392: 1389: 1384: 1380: 1376: 1372: 1368: 1364: 1359: 1354: 1350: 1346: 1339: 1336: 1331: 1327: 1322: 1317: 1313: 1309: 1304: 1299: 1295: 1291: 1287: 1280: 1277: 1272: 1268: 1264: 1260: 1256: 1252: 1247: 1242: 1238: 1234: 1227: 1225: 1223: 1219: 1214: 1210: 1205: 1200: 1196: 1192: 1187: 1182: 1178: 1174: 1170: 1163: 1160: 1155: 1151: 1147: 1143: 1139: 1135: 1130: 1125: 1121: 1117: 1110: 1108: 1106: 1104: 1102: 1098: 1093: 1089: 1084: 1079: 1075: 1071: 1066: 1061: 1057: 1053: 1049: 1042: 1040: 1038: 1034: 1029: 1025: 1021: 1017: 1013: 1009: 1004: 999: 995: 991: 984: 981: 976: 972: 968: 964: 960: 952: 950: 948: 944: 938: 933: 929: 925: 921: 917: 913: 906: 904: 902: 900: 896: 891: 887: 883: 879: 875: 871: 866: 861: 857: 853: 849: 842: 840: 836: 832: 828: 822: 818: 813: 808: 804: 800: 795: 790: 786: 782: 778: 776: 767: 765: 763: 761: 759: 757: 753: 746: 742: 739: 738: 734: 732: 730: 726: 718: 714: 710: 703: 701: 699: 673: 670:1,700 pc 667: 662: 638: 632: 624: 622: 620: 616: 612: 608: 607:spectroscopic 604: 603:main sequence 599: 597: 593: 589: 585: 581: 577: 570: 566: 562: 558: 553: 546: 544: 535: 531: 527: 523: 519: 511: 508: 506: 505: 501: 500: 495: 490: 489:Gaia DR2 486: 483: 13138, 482: 478: 474: 470: 465: 462: 458: 454: 451: 447: 445: 444: 440: 439: 436: 432: 430: 429: 425: 424: 421: 412: 410: 409: 405: 404: 401: 392: 390: 389: 385: 384: 381: 372: 370: 369: 365: 364: 360: 355: 351: 347: 345: 339: 335: 334: 330: 325: 321: 319: 318: 314: 313: 310: 306: 304: 302: 298: 297: 294: 290: 282: 278: 271: 269: 267: 266:Proper motion 263: 262: 258: 256: 250: 246: 245: 241: 238: 234: 231: 228: 226: 223: 222: 218: 216: 212: 211: 207: 205: 201: 200: 196: 193: 190: 189: 185: 182: 179: 178: 174: 171: 168: 167: 163: 160: 157: 156: 152: 149: 146: 145: 141: 139: 136: 135: 130: 126: 122: 118: 117: 113: 111: 108: 107: 103:20 32 40.9572 101: 98: 94: 93: 90: 87: 85: 84:Constellation 82: 81: 77: 73: 67: 55: 48: 38: 30: 26: 22: 2695:W75N(B)-VLA2 2650:KIC 11145123 2645:KIC 11026764 2584: 1422: 1418: 1412: 1391: 1348: 1344: 1338: 1293: 1289: 1279: 1236: 1232: 1176: 1172: 1162: 1119: 1115: 1055: 1051: 993: 989: 983: 966: 962: 919: 915: 855: 851: 784: 780: 774: 722: 674: 663: 628: 600: 598:to be seen. 582:(1,400  573: 557:V382 Carinae 517: 516: 502: 469:Cyg OB2 441: 433:13,700  426: 406: 386: 366: 336: 315: 299: 264: 247: 197:2.704±0.364 186:3.512±0.260 175:4.667±0.324 20: 3437:HD 191806 b 3427:HD 187123 b 3422:HD 185269 b 3061:Veil Nebula 3059:(including 3056:Cygnus Loop 2927:Sadr Region 2884:Barnard 147 2879:Barnard 146 2848:(including 2771:Berkeley 86 2735:Association 2690:SPECULOOS-3 2640:KIC 9832227 2635:KIC 8462852 2600:G79.29+0.46 2570:BD+40° 4210 1578:ε (Aljanah) 1573:δ (Fawaris) 1563:β (Albireo) 1296:(2): 1838. 580:light-years 471: #12, 428:Temperature 215:color index 204:color index 110:Declination 3507:Categories 3276:64b (PH1b) 3149:Exoplanets 2960:Egg Nebula 2791:Messier 39 2786:Messier 29 2753:Cygnus OB9 2748:Cygnus OB7 2743:Cygnus OB2 2595:Cygnus X-3 2590:Cygnus X-1 2575:BD+43 3654 1403:2301.08916 1303:1901.02959 1246:1906.00762 1186:1602.05042 1065:1707.04473 969:: II/246. 794:2208.00211 747:References 729:HR diagram 704:Properties 664:The later 588:extinction 561:Betelgeuse 547:Cygnus OB2 522:hypergiant 475: 12, 408:Luminosity 237:Astrometry 194: (K) 183: (H) 172: (J) 161: (V) 150: (B) 27:is due to 3417:b Cygni b 3125:4C +48.48 2947:Planetary 2835:Molecular 2710:Wolf 1069 2680:N6946-BH1 2565:AFGL 2591 1718:Flamsteed 1558:α (Deneb) 1457:123003317 1432:1306.1087 1358:0708.1752 1330:118869784 1271:173990444 1213:118824868 1129:1202.3991 1092:119537489 1058:(1): 39. 865:1311.5087 858:(2): 40. 821:244398875 635:840  596:telescope 565:VV Cephei 448:3.0  393:246  373:110  142:B3–4 Ia+ 123: (V) 3466:Exomoons 3447:KELT-20b 3130:Cygnus A 3077:Galaxies 3015:NGC 7048 3010:NGC 7027 3005:NGC 7026 3000:NGC 7008 2995:NGC 6884 2990:NGC 6881 2985:NGC 6826 2955:Abell 78 2912:NGC 6914 2845:Cygnus X 2821:NGC 6910 2816:NGC 6871 2811:NGC 6866 2806:NGC 6834 2801:NGC 6819 2796:NGC 6811 2726:clusters 2620:HAT-P-17 2610:G 208-45 2605:G 208-44 2366:86 (PH2) 2321:64 (PH1) 1886:Variable 1568:γ (Sadr) 1383:18759600 1154:11978733 1122:: A145. 1028:55121658 890:22036552 735:See also 717:infrared 694:☉ 687:☉ 680:☉ 659:☉ 652:☉ 645:☉ 625:Distance 611:spectrum 541:☉ 419:☉ 399:☉ 379:☉ 340: (M 317:Distance 301:Parallax 3488:1708b I 3483:1625b I 3452:TrES-5b 3442:KELT-9b 2937:Sh2-106 2932:Sh2-101 2889:IC 5146 2862:Nebulae 2781:IC 5146 2700:WASP-48 2675:MWC 349 2670:KOI-256 2630:KELT-20 1437:Bibcode 1363:Bibcode 1308:Bibcode 1251:Bibcode 1239:: A99. 1191:Bibcode 1134:Bibcode 1070:Bibcode 1008:Bibcode 971:Bibcode 924:Bibcode 870:Bibcode 799:Bibcode 532:in the 473:Schulte 357:Details 127:11.702 76:Equinox 3475:Kepler 3158:Kepler 3120:3C 438 2837:clouds 2665:KOI-81 2660:KOI-74 2625:KELT-9 2153:Kepler 2125:Gliese 2115:197037 2110:191806 2105:188753 2100:187123 2095:185435 2090:185269 1861:71 (g) 1856:68 (A) 1851:63 (f) 1841:59 (f) 1791:29 (b) 1786:28 (b) 1781:27 (b) 1776:26 (e) 1761:20 (d) 1751:16 (c) 1455:  1381:  1328:  1269:  1211:  1152:  1090:  1026:  888:  831:VizieR 819:  787:: A1. 713:UKIDSS 567:, and 534:galaxy 504:SIMBAD 388:Radius 164:11.40 153:14.41 89:Cygnus 78:J2000 3410:Other 3401:1708b 3391:1649b 3386:1658b 3381:1652b 3376:1625b 3371:1520b 3366:1229b 3113:Other 2980:M1-92 2894:L1014 2850:DR 21 2655:KOI-5 2558:Other 2039:V2513 2034:V2214 2029:V1974 2024:V1794 2019:V1668 2014:V1500 2009:V1489 2004:V1334 1999:V1191 1994:V1143 1989:V1057 1984:V1027 1550:Bayer 1541:Stars 1453:S2CID 1427:arXiv 1398:arXiv 1379:S2CID 1353:arXiv 1326:S2CID 1298:arXiv 1267:S2CID 1241:arXiv 1209:S2CID 1181:arXiv 1150:S2CID 1124:arXiv 1088:S2CID 1060:arXiv 1024:S2CID 998:arXiv 886:S2CID 860:arXiv 825: 817:S2CID 789:arXiv 715:near- 615:x-ray 592:Deneb 477:2MASS 348:−9.82 285:Dec.: 219:3.01 208:1.69 72:Epoch 3361:737b 3356:560b 3351:452b 3346:451b 3341:432b 3336:419b 3331:409b 3321:371b 3306:186b 3104:7013 3099:6946 3094:6801 2904:H II 2871:Dark 2776:DR 6 2763:Open 2724:Star 2524:138a 2481:1708 2476:1649 2471:1625 2466:1520 2461:1229 2143:1245 2072:8193 2067:7912 2062:7767 2057:7633 1979:V476 1974:V404 1969:V389 1964:V380 1177:1602 967:2246 775:Gaia 661:. 629:The 510:data 368:Mass 230:cLBV 213:B−V 202:U−B 3301:87c 3296:78b 3291:70b 3286:69b 3281:68b 3271:61b 3266:56b 3261:47b 3256:41b 3251:40b 3246:39b 3241:36b 3236:34b 3231:33b 3226:32b 3221:28b 3216:23b 3211:22b 3206:17b 3201:16b 3196:15b 3191:11b 3086:NGC 3048:SNR 2549:150 2544:148 2539:147 2534:142 2529:140 2519:137 2514:136 2509:135 2504:134 2499:133 2456:737 2451:560 2446:452 2441:451 2436:445 2431:432 2426:419 2421:411 2416:385 2411:371 2406:289 2401:223 2396:186 2391:182 2386:167 2381:107 2138:806 2133:777 1445:doi 1371:doi 1349:474 1316:doi 1294:484 1259:doi 1237:627 1199:doi 1142:doi 1120:541 1078:doi 1056:845 1016:doi 932:doi 920:125 878:doi 856:147 829:at 807:doi 785:674 485:HIP 481:NSV 450:Myr 443:Age 309:mas 303:(π) 289:mas 277:mas 273:RA: 268:(μ) 3509:: 3186:6b 3181:5b 3176:3c 3171:3b 3166:2b 3030:WR 2491:WR 2376:89 2371:87 2361:84 2356:80 2351:78 2346:70 2341:69 2336:68 2331:67 2326:66 2316:63 2311:61 2306:56 2301:51 2296:47 2291:45 2286:44 2281:43 2276:42 2271:41 2266:40 2261:39 2256:36 2251:35 2246:34 2241:33 2236:32 2231:31 2226:29 2221:28 2216:27 2211:23 2206:22 2201:18 2196:17 2191:16 2186:15 2181:11 2082:HD 2049:HR 1959:KY 1954:CH 1949:BI 1944:BC 1939:AZ 1934:TT 1929:SU 1924:SS 1919:RW 1876:75 1871:74 1866:72 1846:61 1836:57 1831:56 1826:55 1821:52 1816:47 1811:41 1806:39 1801:35 1796:33 1771:23 1766:22 1756:17 1746:15 1451:. 1443:. 1435:. 1423:57 1421:. 1377:. 1369:. 1361:. 1347:. 1324:. 1314:. 1306:. 1292:. 1288:. 1265:. 1257:. 1249:. 1235:. 1221:^ 1207:. 1197:. 1189:. 1175:. 1171:. 1148:. 1140:. 1132:. 1118:. 1100:^ 1086:. 1076:. 1068:. 1054:. 1050:. 1036:^ 1022:. 1014:. 1006:. 994:48 992:. 965:. 961:. 946:^ 930:. 918:. 914:. 898:^ 884:. 876:. 868:. 854:. 838:^ 815:. 805:. 797:. 783:. 779:. 755:^ 700:. 637:pc 584:pc 563:, 559:, 329:pc 324:ly 293:yr 281:yr 251:(R 3432:c 3396:c 3326:c 3316:f 3311:e 3063:) 2852:) 2176:6 2171:5 2166:3 2161:2 1914:Y 1909:X 1904:W 1899:T 1894:R 1741:9 1736:8 1731:4 1726:2 1708:Q 1703:P 1698:ω 1693:ω 1688:ψ 1683:χ 1678:φ 1673:υ 1668:τ 1663:σ 1658:ρ 1653:π 1643:ο 1638:o 1633:o 1628:ξ 1623:ν 1618:μ 1613:λ 1608:κ 1603:ι 1598:ι 1593:θ 1588:η 1583:ζ 1512:e 1505:t 1498:v 1459:. 1447:: 1439:: 1429:: 1406:. 1400:: 1385:. 1373:: 1365:: 1355:: 1332:. 1318:: 1310:: 1300:: 1273:. 1261:: 1253:: 1243:: 1215:. 1201:: 1193:: 1183:: 1156:. 1144:: 1136:: 1126:: 1094:. 1080:: 1072:: 1062:: 1030:. 1018:: 1010:: 1000:: 977:. 973:: 940:. 934:: 926:: 892:. 880:: 872:: 862:: 833:. 823:. 809:: 801:: 791:: 773:" 691:M 684:R 677:L 656:M 649:R 642:L 538:M 435:K 416:L 396:R 376:M 344:) 342:V 331:) 291:/ 279:/ 255:) 253:v 31:. 25:#

Index

#
technical restrictions


Epoch
Equinox
Constellation
Cygnus
Right ascension
Declination
Apparent magnitude
Spectral type
Apparent magnitude
Apparent magnitude
Apparent magnitude
Apparent magnitude
Apparent magnitude
color index
color index
Variable type
cLBV
Astrometry
Radial velocity
Proper motion
mas
yr
mas
yr
Parallax
mas

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