Knowledge (XXG)

WR 140

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897: 856:. Indeed, the spectrographic presence of these elements, along with a notable absence of hydrogen, were one of the original diagnostic criteria for classifying a star as Wolf–Rayet. It is these enriched layers of the photosphere that are lost in repeating pulses. Once distant from the surface, the carbon fraction of this ejected material begins to glow at approximately 1000  1024:. This helium burning provided a burst of radiation pressure that propagated through the star, up to its surface. The star began to inflate, though this increase in size was only temporary. The thin shell of helium fusion eventually caused enough expansion to moderate, or even extinguish its own reaction. The star once again began to collapse. 28: 985:
some variety of spiral. This is thought to be the result of the dueling solar winds in binary systems, which compress clouds of dust into distinct shock fronts. The concentric nature of WR 140's dust shells is not well understood, although it may be related to nuclear processes in the Wolf–Rayet star's core.
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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
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into space. Following this, the star began to fuse helium at a greater rate and temporarily regained its former radiation pressure. This helium fusion once again stalled, and the subsequent gravitational collapse dislodged another layer of photosphere into space. These pulses will continue as long as
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collide with the dust formation created by the Wolf–Rayet star, causing the unusual bulges and angles in the concentric shells of dust. The dust typically emitted by Wolf–Rayet systems is not so coherent or concentric as those of WR 140. The dust lanes around Wolf–Rayets are most commonly observed as
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Fahed, R.; Moffat, A. F. J.; Zorec, J.; Eversberg, T.; Chené, A. N.; Alves, F.; Arnold, W.; Bergmann, T.; Corcoran, M. F.; Correia Viegas, N. G.; Dougherty, S. M.; Fernando, A.; Frémat, Y.; Gouveia Carreira, L. F.; Hunger, T.; Knapen, J. H.; Leadbeater, R.; Marques Dias, F.; Martayan, C.; Morel, T.;
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The immense surface temperature of Wolf–Rayet stars (up to 210,000 K) produces intense ultraviolet radiation, enough to make 20 or more layers visible to instrumentation. The distance between the concentric shells of ejected material corresponds to the time between one faltering of the star's
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Monnier, J. D.; Zhao, Ming; Pedretti, E.; Millan-Gabet, R.; Berger, J.-P.; Traub, W.; Schloerb, F. P.; Ten Brummelaar, T.; McAlister, H.; Ridgway, S.; Sturmann, L.; Sturmann, J.; Turner, N.; Baron, F.; Kraus, S.; Tannirkulam, A.; Williams, P. M. (2011). "First Visual Orbit for the Prototypical
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of the stars that orbit one another in WR 140 may be responsible for concentrating dust into discrete bands, it is not known how the concentric shells are formed. It is thought that nuclear processes in the Wolf–Rayet star may contribute an unusual degree of coherence to dust emissions.
1039:, which then carries it away from the star at several hundred kilometers per second. It is not well understood whether the unusual concentricity of WR 140's dust is due to interactions between the two stellar winds or is the result of nuclear processes in the Wolf–Rayet member. 919:, although WR 133 also in Cygnus is comparably bright. Being less massive, less luminous, and probably less visually bright than its primary the Wolf–Rayet component is identified as the secondary star, despite the fact that it dominates the spectrum with its broad 1043:
helium burning and another. This period is close to eight years, with new emissions having been observed in 1985, 1993, 2001, and 2009. One estimate places the distance between shells at around 1.4 trillion km, meaning that if the
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production. In this mode of cosmic dust production, detritus enriched in silicon and carbon is periodically blown into the wider universe by certain stars toward the end of their lives. Such stars are termed Wolf–Rayets.
961:, whose visual brightness varies only very slightly. Interest with this WR 140 system is principally observing the infrared light fluctuations during the component's orbit, being extensively studied because of its episodic 2638: 1396:
Pourbaix, D.; Tokovinin, A. A.; Batten, A. H.; Fekel, F. C.; Hartkopf, W. I.; Levato, H.; Morrell, N. I.; Torres, G.; Udry, S. (2004). "SB9: The ninth catalogue of spectroscopic binary orbits".
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This collapse eventually began to slow as it grew more intense and heated the star's interior. Along the edge of the core a thin shell experienced temperatures and pressures sufficient to begin
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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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Pittard, J. M.; Pollock, A. M. T.; Rauw, G.; Reinecke, N.; Ribeiro, J.; Romeo, N.; SĂĄnchez-Gallego, J. R.; Dos Santos, E. M.; Schanne, L.; et al. (2011).
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Panov, Kiril P.; Altmann, Martin; Seggewiss, Wilhelm (March 2000). "Long-term photometry of the Wolf-Rayet stars WR 137, WR 140, WR 148, and WR 153".
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absorption lines of the O4–5 primary and C IV emission lines at 465.0 nm for WR 140. Separation between these two stars varies from 1.3
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Van Der Hucht, K. A. (2006). "New Galactic Wolf–Rayet stars, and candidates. An annex to the VIIth Catalogue of Galactic Wolf–Rayet Stars".
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Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+, 2007-2017)".
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of 7.9 ± 0.2 years, which has been determined from the velocity variations observed with the component's spectral lines, mostly from the
958: 1593:"Orbital Elements and Individual Component Masses from Joint Spectroscopic and Astrometric Data of Double-line Spectroscopic Binaries" 36:, taken in July 2022. The nebula is formed by the binary and only the innermost shells were previously imaged with Keck in 1999/2001. 2610: 4028: 4018: 3998: 1982: 51: 1076:
Monnier, J. D.; Tuthill, P. G.; Danchi, W. C. (2002-03-01). "Proper Motions of New Dust in the Colliding Wind Binary WR 140".
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However, at the surface this loss of internal radiation pressure had the effect of blowing the outermost layers of the star's
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radiation, the wavelength of its greatest luminosity. This has the effect of rebroadcasting the star's UV radiation in the
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Shenavrin, V. I.; Taranova, O. G.; Nadzhip, A. E. (2011). "Search for and study of hot circumstellar dust envelopes".
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Ducati, J. R. (2002). "VizieR On-Line Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system".
1056: 869: 2371: 1454: 1017:. The Wolf–Rayet star began to lose volume as its own gravitational contraction compacted its cooler interior. 951: 720: 2926: 1508: 3620: 3330: 2016: 1059:
image at top right these intervals can be highly stable, continuing over many decades or hundreds of years.
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Taranova, O. G.; Shenavrin, V. I. (2011-01-01). "WR 140 (=V1687 Cyg): Infrared photometry, 2001–2010".
1754:"Spectroscopy of the archetype colliding-wind binary WR 140 during the 2009 January periastron passage" 3402: 1867: 1806: 1765: 1733: 1672: 1614: 1552: 1486: 1415: 1365: 1319: 1282: 1234: 1207: 1159: 1095: 1021: 785: 394: 267: 1013:
this fusion provided, the balance that determines the radii of all stars shifted decisively towards
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The cast-off materials are essentially extremely large injections of cosmic dust into the star's
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brightness increases dramatically and then slowly drops again over a period of months. Here
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Anguita-Aguero, Jennifer; Mendez, Rene A.; Clavería, Rubén M.; Costa, Edgardo (2022).
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As the Wolf–Rayet star in WR 140 neared the end of its short life its core ran out of
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WR 140 is listed as a Wolf–Rayet variable star, and has been given the
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Williams, Peredur (2011). "Results from the 2009 campaign on WR 140".
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Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction".
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WR 140 has been described as the brightest Wolf–Rayet star in the
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Data Release 2: Summary of the contents and survey properties"
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this cycle of intermittent helium fusion can repeat itself.
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were such a Wolf–Rayet star one shell would be well into the
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for V1687 Cygni, plotted from data published by Panov
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Bulletin de la Société Royale des Sciences de LiÚge
1055:before another shell were cast off. As seen in the 1457:; et al. (Gaia collaboration) (August 2018). 923:. The primary star is an O4–5 star, most likely a 828:WR 140 is thought to be a prototypical example of 1944:Monthly Notices of the Royal Astronomical Society 1758:Monthly Notices of the Royal Astronomical Society 32:This image shows WR 140 and its nebula with JWST 965:formation. It is now regarded as the prototype 1835:"Episodic (and variable) dust-making WR stars" 836:The outermost layers of a Wolf–Rayet star are 1990: 1911:"Surprised no-one spotted my awful maths yet" 92:+43° 51′ 16.2802″ 8: 876:traveling away from its surface creates the 1658: 1656: 1654: 1652: 1650: 1648: 1646: 1275:CDS/ADC Collection of Electronic Catalogues 1200:CDS/ADC Collection of Electronic Catalogues 1135: 1133: 3956: 3639: 3567: 3352: 3216: 2031: 1997: 1983: 1975: 1527: 1525: 1523: 1521: 1965: 1955: 1818: 1777: 1727: 1626: 1608: 1586: 1584: 1582: 1546: 1500: 1490: 1480: 1409: 1313: 1153: 1089: 1193: 1191: 1189: 4024:Objects with variable star designations 1938:Thomas, Joshua D.; et al. (2021). 1793:Moffat, A. F. J.; Shara, M. M. (1986). 1068: 223: 1351: 1349: 18: 1449: 1447: 1445: 868:, and it is this that is detected by 7: 1391: 1389: 1387: 1385: 1383: 1381: 1379: 50:       993:While interactions between the two 959:General Catalogue of Variable Stars 860:. The heating is due to the star's 235: 16:Star in the constellation of Cygnus 14: 1535:The Astrophysical Journal Letters 1779:10.1111/j.1365-2966.2011.19035.x 884:rather than the far more common 780:is a visually moderately bright 26: 1533:Colliding-wind Binary WR 140". 1509:Gaia DR2 record for this source 976:passage every eight years, the 258:0.5815 Â± 0.0286  4014:Henry Draper Catalogue objects 1: 892:Binary system characteristics 1468:Astronomy & Astrophysics 1051:and around 5% of the way to 989:Mechanism of dust production 943:at periastron to 23.9 AU at 1502:10.1051/0004-6361/201833051 792:, whose primary star is an 4055: 1716:Astronomy and Astrophysics 1565:10.1088/2041-8205/742/1/L1 1428:10.1051/0004-6361:20041213 1398:Astronomy and Astrophysics 1358:Vizier Online Data Catalog 1332:10.1051/0004-6361:20065819 1302:Astronomy and Astrophysics 1172:10.1051/0004-6361:20078357 1142:Astronomy and Astrophysics 2012: 1880:10.1134/S1063773710091014 1247:10.1134/S1063772911010070 1078:The Astrophysical Journal 952:variable star designation 756: 718: 711: 633: 573: 568: 315: 311: 193: 186: 109: 41: 24: 1628:10.3847/1538-3881/ac478c 1597:The Astronomical Journal 2017:List of stars in Cygnus 2006:Constellation of Cygnus 1738:2000A&A...355..607P 1492:2018A&A...616A...1G 1420:2004A&A...424..727P 1324:2006A&A...458..453V 1164:2007A&A...474..653V 1009:. With the loss of the 880:of a Wolf–Rayet: broad 800:. It is located in the 289:Absolute magnitude 143:Apparent magnitude 132:Apparent magnitude 99:Apparent magnitude 34:Mid-Infrared Instrument 4029:Durchmusterung objects 4019:Spectroscopic binaries 3999:Cygnus (constellation) 3621:ZTF J203349.8+322901.1 1967:10.1093/mnras/stab1181 1015:gravitational collapse 912: 492:Argument of periastron 967:colliding-wind binary 899: 438:Longitude of the node 3403:North America Nebula 1799:Astronomical Journal 1691:"WR140 Introduction" 786:spectroscopic binary 1872:2011AstL...37...30T 1811:1986AJ.....92..952M 1770:2011MNRAS.418....2F 1677:2011BSRSL..80..595W 1619:2022AJ....163..118A 1557:2011ApJ...742L...1M 1370:2009yCat....102025S 1287:2003yCat.2246....0C 1239:2011ARep...55...31S 1212:2002yCat.2237....0D 1100:2002ApJ...567L.137M 917:northern hemisphere 870:suitable telescopes 757:Database references 747: J20205+4351, 21: 3506:Soap Bubble Nebula 1909:Mark McCaughrean. 1011:radiation pressure 913: 886:absorption spectra 784:placed within the 751:J20202798+4351164 713:Other designations 238: âˆ’2.047  226: âˆ’4.653  176:Variable type 116:Spectral type 19: 4034:Hipparcos objects 3986: 3985: 3982: 3981: 3946: 3945: 3629: 3628: 3557: 3556: 3550: 3339: 3315: 3314: 3204: 3203: 1860:Astronomy Letters 1227:Astronomy Reports 775: 774: 278:(1,720 ± 80  273:5,600 ± 300  4046: 4004:Wolf–Rayet stars 3957: 3640: 3568: 3544: 3353: 3333: 3217: 2032: 1999: 1992: 1985: 1976: 1971: 1969: 1959: 1950:(4): 5221–5230. 1925: 1924: 1922: 1921: 1906: 1900: 1899: 1855: 1849: 1848: 1846: 1845: 1831: 1825: 1824: 1822: 1790: 1784: 1783: 1781: 1748: 1742: 1741: 1731: 1729:astro-ph/0002221 1711: 1705: 1704: 1702: 1701: 1687: 1681: 1680: 1660: 1641: 1640: 1630: 1612: 1588: 1577: 1576: 1550: 1529: 1516: 1506: 1504: 1494: 1484: 1451: 1440: 1439: 1413: 1411:astro-ph/0406573 1393: 1374: 1373: 1353: 1344: 1343: 1317: 1315:astro-ph/0609008 1297: 1291: 1290: 1265: 1259: 1258: 1222: 1216: 1215: 1195: 1184: 1183: 1157: 1137: 1128: 1127: 1093: 1091:astro-ph/0202315 1084:(2): L137–L140. 1073: 902:ultraviolet band 882:emission spectra 563: 562: 561: 536: 534: 510: 509: 508: 496: 484: 483: 482: 475: 467: 451: 449: 442: 429: 428: 427: 407: 405: 387: 386: 385: 375: 360: 359: 358: 307:: −6.11 to −5.94 237: 225: 110:Characteristics 102: 82: 77: 42:Observation data 30: 22: 4054: 4053: 4049: 4048: 4047: 4045: 4044: 4043: 3989: 3988: 3987: 3978: 3942: 3891: 3625: 3594: 3553: 3528: 3524:Crescent Nebula 3510: 3456:IRAS 20324+4057 3451:IRAS 19475+3119 3427: 3384: 3342: 3322: 3311: 3243: 3211: 3200: 3191:WISE J2000+3629 3101:GSC 03949-00967 3039: 2971: 2633: 2605: 2562: 2529: 2366: 2198: 2021: 2008: 2003: 1937: 1934: 1932:Further reading 1929: 1928: 1919: 1917: 1908: 1907: 1903: 1857: 1856: 1852: 1843: 1841: 1833: 1832: 1828: 1792: 1791: 1787: 1750: 1749: 1745: 1713: 1712: 1708: 1699: 1697: 1689: 1688: 1684: 1662: 1661: 1644: 1590: 1589: 1580: 1531: 1530: 1519: 1455:Brown, A. G. A. 1453: 1452: 1443: 1395: 1394: 1377: 1355: 1354: 1347: 1299: 1298: 1294: 1267: 1266: 1262: 1224: 1223: 1219: 1197: 1196: 1187: 1139: 1138: 1131: 1075: 1074: 1070: 1065: 991: 894: 826: 798:class O4–5 star 782:Wolf–Rayet star 752: 691: 688: 684:1,600,000  673: 670: 653: 650: 613: 610: 593: 590: 559: 557: 556: 554: 550: 548: 532: 530: 526: 524: 506: 504: 503: 501: 497: 489: 480: 478: 477: 473: 471: 457: 447: 445: 435: 425: 423: 422: 420: 403: 401: 383: 381: 380: 378: 371:Semi-major axis 368: 356: 354: 353: 351: 303: 294: 277: 234: 205: 200:Radial velocity 97: 80: 75:Right ascension 73: 43: 37: 31: 17: 12: 11: 5: 4052: 4050: 4042: 4041: 4036: 4031: 4026: 4021: 4016: 4011: 4006: 4001: 3991: 3990: 3984: 3983: 3980: 3979: 3977: 3976: 3971: 3965: 3963: 3954: 3948: 3947: 3944: 3943: 3941: 3940: 3935: 3930: 3925: 3920: 3915: 3910: 3905: 3899: 3897: 3893: 3892: 3890: 3889: 3884: 3879: 3874: 3869: 3864: 3859: 3854: 3849: 3844: 3839: 3834: 3829: 3824: 3819: 3814: 3809: 3804: 3799: 3794: 3789: 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3108: 3103: 3098: 3093: 3088: 3083: 3078: 3073: 3071:Cygnus OB2 #12 3068: 3066:Cygnus OB2 #8A 3063: 3058: 3053: 3047: 3045: 3041: 3040: 3038: 3037: 3032: 3027: 3022: 3017: 3012: 3007: 3002: 2997: 2992: 2987: 2981: 2979: 2973: 2972: 2970: 2969: 2964: 2959: 2954: 2949: 2944: 2939: 2934: 2929: 2924: 2919: 2914: 2909: 2904: 2899: 2894: 2889: 2884: 2879: 2874: 2869: 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: 2684: 2679: 2674: 2669: 2664: 2659: 2654: 2649: 2643: 2641: 2635: 2634: 2632: 2631: 2626: 2621: 2615: 2613: 2607: 2606: 2604: 2603: 2598: 2593: 2588: 2583: 2578: 2572: 2570: 2564: 2563: 2561: 2560: 2555: 2550: 2545: 2539: 2537: 2531: 2530: 2528: 2527: 2522: 2517: 2512: 2507: 2502: 2497: 2492: 2487: 2482: 2477: 2472: 2467: 2462: 2457: 2452: 2447: 2442: 2437: 2432: 2427: 2422: 2417: 2412: 2407: 2402: 2397: 2392: 2387: 2382: 2376: 2374: 2368: 2367: 2365: 2364: 2359: 2354: 2349: 2344: 2339: 2334: 2329: 2324: 2319: 2314: 2309: 2304: 2299: 2294: 2289: 2284: 2279: 2274: 2269: 2264: 2259: 2254: 2249: 2244: 2239: 2234: 2229: 2224: 2219: 2214: 2208: 2206: 2200: 2199: 2197: 2196: 2191: 2186: 2181: 2176: 2171: 2166: 2161: 2156: 2151: 2146: 2141: 2136: 2134:π (Azelfafage) 2131: 2126: 2121: 2116: 2111: 2106: 2101: 2096: 2091: 2086: 2081: 2076: 2071: 2066: 2061: 2056: 2051: 2046: 2040: 2038: 2029: 2023: 2022: 2020: 2019: 2013: 2010: 2009: 2004: 2002: 2001: 1994: 1987: 1979: 1973: 1972: 1933: 1930: 1927: 1926: 1901: 1850: 1826: 1820:10.1086/114227 1785: 1743: 1706: 1682: 1642: 1578: 1517: 1441: 1404:(2): 727–732. 1375: 1345: 1308:(2): 453–459. 1292: 1260: 1217: 1185: 1148:(2): 653–664. 1129: 1108:10.1086/340005 1067: 1066: 1064: 1061: 1053:Alpha Centauri 990: 987: 972:Shortly after 933:orbital period 921:emission lines 893: 890: 825: 822: 773: 772: 767: 759: 758: 754: 753: 735: 100287, 731: 193793, 719: 716: 715: 709: 708: 702: 694: 693: 689: 686: 682: 676: 675: 671: 668: 664: 656: 655: 651: 648: 644: 636: 635: 631: 630: 624: 616: 615: 611: 608: 604: 596: 595: 591: 588: 584: 576: 575: 571: 570: 566: 565: 552: 546: 543:Semi-amplitude 539: 538: 528: 522: 518:Semi-amplitude 513: 512: 499: 486: 485: 468: 454: 453: 443: 432: 431: 418: 409: 408: 399: 390: 389: 376: 365: 364: 349: 340: 339: 336: 330: 329: 326: 320: 319: 313: 312: 309: 308: 302:: −6.6 to −4.8 297: 292: 284: 283: 271: 263: 262: 256: 247: 246: 221: 212: 211: 210:3.10 km/s 208: 203: 195: 194: 191: 190: 184: 183: 178: 172: 171: 168: 161: 160: 157: 150: 149: 146: 139: 138: 135: 128: 127: 118: 112: 111: 107: 106: 103: 94: 93: 90: 84: 83: 81:20 20 27.97608 78: 70: 69: 64: 58: 57: 39: 38: 25: 15: 13: 10: 9: 6: 4: 3: 2: 4051: 4040: 4037: 4035: 4032: 4030: 4027: 4025: 4022: 4020: 4017: 4015: 4012: 4010: 4009:2MASS objects 4007: 4005: 4002: 4000: 3997: 3996: 3994: 3975: 3972: 3970: 3967: 3966: 3964: 3962: 3958: 3955: 3953: 3949: 3939: 3936: 3934: 3931: 3929: 3926: 3924: 3921: 3919: 3916: 3914: 3911: 3909: 3906: 3904: 3901: 3900: 3898: 3894: 3888: 3885: 3883: 3880: 3878: 3875: 3873: 3870: 3868: 3865: 3863: 3860: 3858: 3855: 3853: 3850: 3848: 3845: 3843: 3840: 3838: 3835: 3833: 3830: 3828: 3825: 3823: 3820: 3818: 3815: 3813: 3810: 3808: 3805: 3803: 3800: 3798: 3795: 3793: 3790: 3788: 3785: 3783: 3780: 3778: 3775: 3773: 3770: 3768: 3765: 3763: 3760: 3758: 3755: 3753: 3750: 3748: 3745: 3743: 3740: 3738: 3735: 3733: 3730: 3728: 3725: 3723: 3720: 3718: 3715: 3713: 3710: 3708: 3705: 3703: 3700: 3698: 3695: 3693: 3690: 3688: 3685: 3683: 3680: 3678: 3675: 3673: 3670: 3668: 3665: 3663: 3660: 3658: 3655: 3653: 3650: 3649: 3647: 3645: 3641: 3638: 3636: 3632: 3622: 3619: 3617: 3614: 3612: 3609: 3607: 3604: 3603: 3601: 3597: 3591: 3588: 3586: 3583: 3581: 3578: 3577: 3575: 3573: 3569: 3566: 3564: 3560: 3548: 3543: 3540: 3539: 3537: 3535: 3531: 3525: 3522: 3521: 3519: 3517: 3513: 3507: 3504: 3502: 3499: 3497: 3494: 3492: 3489: 3487: 3484: 3482: 3479: 3477: 3474: 3472: 3469: 3467: 3464: 3462: 3461:Kronberger 61 3459: 3457: 3454: 3452: 3449: 3447: 3444: 3442: 3439: 3438: 3436: 3434: 3430: 3424: 3421: 3419: 3416: 3414: 3411: 3409: 3406: 3404: 3401: 3399: 3396: 3395: 3393: 3391: 3387: 3381: 3378: 3376: 3373: 3371: 3368: 3366: 3363: 3362: 3360: 3358: 3354: 3351: 3349: 3345: 3337: 3332: 3329: 3328: 3326: 3324: 3318: 3308: 3305: 3303: 3300: 3298: 3295: 3293: 3290: 3288: 3285: 3283: 3280: 3278: 3275: 3273: 3270: 3268: 3265: 3263: 3260: 3258: 3255: 3254: 3252: 3250: 3246: 3240: 3237: 3235: 3232: 3230: 3227: 3226: 3224: 3222: 3218: 3215: 3213: 3207: 3197: 3194: 3192: 3189: 3187: 3184: 3182: 3179: 3177: 3174: 3172: 3169: 3167: 3164: 3162: 3159: 3157: 3154: 3152: 3149: 3147: 3144: 3142: 3139: 3137: 3134: 3132: 3129: 3127: 3124: 3122: 3119: 3117: 3114: 3112: 3109: 3107: 3104: 3102: 3099: 3097: 3094: 3092: 3089: 3087: 3084: 3082: 3079: 3077: 3074: 3072: 3069: 3067: 3064: 3062: 3059: 3057: 3054: 3052: 3049: 3048: 3046: 3042: 3036: 3033: 3031: 3028: 3026: 3023: 3021: 3018: 3016: 3013: 3011: 3008: 3006: 3003: 3001: 2998: 2996: 2993: 2991: 2988: 2986: 2983: 2982: 2980: 2978: 2974: 2968: 2965: 2963: 2960: 2958: 2955: 2953: 2950: 2948: 2945: 2943: 2940: 2938: 2935: 2933: 2930: 2928: 2925: 2923: 2920: 2918: 2915: 2913: 2910: 2908: 2905: 2903: 2900: 2898: 2895: 2893: 2890: 2888: 2885: 2883: 2880: 2878: 2875: 2873: 2870: 2868: 2865: 2863: 2860: 2858: 2855: 2853: 2850: 2848: 2845: 2843: 2840: 2838: 2835: 2833: 2830: 2828: 2825: 2823: 2820: 2818: 2815: 2813: 2810: 2808: 2805: 2803: 2800: 2798: 2795: 2793: 2790: 2788: 2785: 2783: 2780: 2778: 2775: 2773: 2770: 2768: 2765: 2763: 2760: 2758: 2755: 2753: 2750: 2748: 2745: 2743: 2740: 2738: 2735: 2733: 2730: 2728: 2725: 2723: 2720: 2718: 2715: 2713: 2710: 2708: 2705: 2703: 2700: 2698: 2695: 2693: 2690: 2688: 2685: 2683: 2680: 2678: 2675: 2673: 2670: 2668: 2665: 2663: 2660: 2658: 2655: 2653: 2650: 2648: 2645: 2644: 2642: 2640: 2636: 2630: 2627: 2625: 2622: 2620: 2617: 2616: 2614: 2612: 2608: 2602: 2599: 2597: 2594: 2592: 2589: 2587: 2584: 2582: 2579: 2577: 2574: 2573: 2571: 2569: 2565: 2559: 2556: 2554: 2551: 2549: 2546: 2544: 2541: 2540: 2538: 2536: 2532: 2526: 2523: 2521: 2518: 2516: 2513: 2511: 2508: 2506: 2503: 2501: 2498: 2496: 2493: 2491: 2488: 2486: 2483: 2481: 2478: 2476: 2473: 2471: 2468: 2466: 2463: 2461: 2458: 2456: 2453: 2451: 2448: 2446: 2443: 2441: 2438: 2436: 2433: 2431: 2428: 2426: 2423: 2421: 2418: 2416: 2413: 2411: 2408: 2406: 2403: 2401: 2398: 2396: 2393: 2391: 2388: 2386: 2383: 2381: 2378: 2377: 2375: 2373: 2369: 2363: 2360: 2358: 2355: 2353: 2350: 2348: 2345: 2343: 2340: 2338: 2335: 2333: 2330: 2328: 2325: 2323: 2320: 2318: 2315: 2313: 2310: 2308: 2305: 2303: 2300: 2298: 2295: 2293: 2290: 2288: 2285: 2283: 2280: 2278: 2275: 2273: 2270: 2268: 2265: 2263: 2260: 2258: 2255: 2253: 2250: 2248: 2245: 2243: 2240: 2238: 2235: 2233: 2230: 2228: 2225: 2223: 2220: 2218: 2215: 2213: 2210: 2209: 2207: 2205: 2201: 2195: 2192: 2190: 2187: 2185: 2182: 2180: 2177: 2175: 2172: 2170: 2167: 2165: 2162: 2160: 2157: 2155: 2152: 2150: 2147: 2145: 2142: 2140: 2137: 2135: 2132: 2130: 2127: 2125: 2122: 2120: 2117: 2115: 2112: 2110: 2107: 2105: 2102: 2100: 2097: 2095: 2092: 2090: 2087: 2085: 2082: 2080: 2077: 2075: 2072: 2070: 2067: 2065: 2062: 2060: 2057: 2055: 2052: 2050: 2047: 2045: 2042: 2041: 2039: 2037: 2033: 2030: 2028: 2024: 2018: 2015: 2014: 2011: 2007: 2000: 1995: 1993: 1988: 1986: 1981: 1980: 1977: 1968: 1963: 1958: 1953: 1949: 1945: 1941: 1936: 1935: 1931: 1916: 1912: 1905: 1902: 1897: 1893: 1889: 1885: 1881: 1877: 1873: 1869: 1865: 1861: 1854: 1851: 1840: 1839:www.roe.ac.uk 1836: 1830: 1827: 1821: 1816: 1812: 1808: 1804: 1800: 1796: 1789: 1786: 1780: 1775: 1771: 1767: 1763: 1759: 1755: 1747: 1744: 1739: 1735: 1730: 1725: 1721: 1717: 1710: 1707: 1696: 1695:www.roe.ac.uk 1692: 1686: 1683: 1678: 1674: 1670: 1666: 1659: 1657: 1655: 1653: 1651: 1649: 1647: 1643: 1638: 1634: 1629: 1624: 1620: 1616: 1611: 1606: 1602: 1598: 1594: 1587: 1585: 1583: 1579: 1574: 1570: 1566: 1562: 1558: 1554: 1549: 1544: 1540: 1536: 1528: 1526: 1524: 1522: 1518: 1514: 1510: 1503: 1498: 1493: 1488: 1483: 1478: 1474: 1470: 1469: 1464: 1462: 1456: 1450: 1448: 1446: 1442: 1437: 1433: 1429: 1425: 1421: 1417: 1412: 1407: 1403: 1399: 1392: 1390: 1388: 1386: 1384: 1382: 1380: 1376: 1371: 1367: 1363: 1359: 1352: 1350: 1346: 1341: 1337: 1333: 1329: 1325: 1321: 1316: 1311: 1307: 1303: 1296: 1293: 1288: 1284: 1280: 1276: 1272: 1264: 1261: 1256: 1252: 1248: 1244: 1240: 1236: 1232: 1228: 1221: 1218: 1213: 1209: 1205: 1201: 1194: 1192: 1190: 1186: 1181: 1177: 1173: 1169: 1165: 1161: 1156: 1151: 1147: 1143: 1136: 1134: 1130: 1125: 1121: 1117: 1113: 1109: 1105: 1101: 1097: 1092: 1087: 1083: 1079: 1072: 1069: 1062: 1060: 1058: 1054: 1050: 1046: 1040: 1038: 1033: 1030: 1025: 1023: 1022:helium fusion 1018: 1016: 1012: 1008: 1005:to fuse into 1004: 999: 996: 995:stellar winds 988: 986: 983: 982:stellar winds 979: 975: 970: 968: 964: 960: 956: 953: 948: 946: 942: 938: 934: 930: 926: 922: 918: 910: 906: 903: 898: 891: 889: 887: 883: 879: 875: 871: 867: 863: 859: 855: 851: 847: 843: 839: 834: 831: 823: 821: 819: 815: 811: 807: 803: 802:constellation 799: 795: 791: 787: 783: 779: 771: 768: 766: 765: 761: 760: 755: 750: 746: 742: 739:3164-1678-1, 738: 734: 730: 726: 723: Cygni, 722: 717: 714: 710: 707: 703: 701: 700: 696: 695: 692: 683: 681: 678: 677: 674: 665: 663: 662: 658: 657: 654: 645: 643: 642: 638: 637: 632: 629: 625: 623: 622: 618: 617: 614: 606:537,000  605: 603: 602: 598: 597: 594: 585: 583: 582: 578: 577: 572: 567: 553: 544: 541: 540: 529: 520: 519: 515: 514: 500: 495: 493: 488: 487: 469: 466: 464: 461: 456: 455: 444: 441: 439: 434: 433: 419: 417: 415: 411: 410: 400: 398: 396: 392: 391: 377: 374: 372: 367: 366: 363: 350: 348: 346: 342: 341: 337: 335: 332: 331: 327: 325: 322: 321: 318: 314: 310: 306: 301: 298: 296: 290: 286: 285: 281: 276: 272: 270: 269: 265: 264: 261: 257: 255: 253: 249: 248: 245: 241: 233: 229: 222: 220: 218: 217:Proper motion 214: 213: 209: 207: 201: 197: 196: 192: 189: 185: 182: 179: 177: 174: 173: 169: 167: 163: 162: 158: 156: 152: 151: 147: 144: 141: 140: 136: 133: 130: 129: 126: 122: 119: 117: 114: 113: 108: 104: 100: 96: 95: 91: 89: 86: 85: 79: 76: 72: 71: 68: 65: 63: 62:Constellation 60: 59: 56: 53: 49: 46: 40: 35: 29: 23: 4039:O-type stars 3181:W75N(B)-VLA2 3136:KIC 11145123 3131:KIC 11026764 3014: 1947: 1943: 1918:. Retrieved 1914: 1904: 1866:(1): 30–39. 1863: 1859: 1853: 1842:. Retrieved 1838: 1829: 1802: 1798: 1788: 1761: 1757: 1746: 1719: 1715: 1709: 1698:. Retrieved 1694: 1685: 1668: 1664: 1600: 1596: 1538: 1534: 1472: 1466: 1460: 1401: 1397: 1361: 1357: 1305: 1301: 1295: 1278: 1274: 1263: 1233:(1): 31–81. 1230: 1226: 1220: 1203: 1199: 1145: 1141: 1081: 1077: 1071: 1041: 1037:stellar wind 1034: 1026: 1019: 1000: 992: 971: 954: 949: 914: 908: 835: 827: 824:Significance 789: 777: 776: 762: 743: 1232, 704:35,000  697: 679: 659: 639: 626:70,000  619: 599: 579: 542: 516: 490: 458: 436: 412: 395:Eccentricity 393: 369: 343: 333: 323: 304: 299: 287: 266: 250: 215: 198: 3923:HD 191806 b 3913:HD 187123 b 3908:HD 185269 b 3547:Veil Nebula 3545:(including 3542:Cygnus Loop 3413:Sadr Region 3370:Barnard 147 3365:Barnard 146 3334:(including 3257:Berkeley 86 3221:Association 3176:SPECULOOS-3 3126:KIC 9832227 3121:KIC 8462852 3086:G79.29+0.46 3056:BD+40° 4210 2064:Δ (Aljanah) 2059:ÎŽ (Fawaris) 2049:ÎČ (Albireo) 1764:(1): 2–13. 1722:: 607–616. 1029:photosphere 905:light curve 830:cosmic dust 699:Temperature 621:Temperature 551:(secondary) 414:Inclination 166:color index 155:color index 88:Declination 3993:Categories 3762:64b (PH1b) 3635:Exoplanets 3446:Egg Nebula 3277:Messier 39 3272:Messier 29 3239:Cygnus OB9 3234:Cygnus OB7 3229:Cygnus OB2 3081:Cygnus X-3 3076:Cygnus X-1 3061:BD+43 3654 1957:2101.10563 1920:2022-09-02 1844:2022-09-02 1700:2022-08-29 1610:2201.04134 1603:(3): 118. 1482:1804.09365 1281:: II/246. 1063:References 1049:Oort Cloud 974:periastron 929:supergiant 727:+43°3571, 680:Luminosity 646:20.5  601:Luminosity 460:Periastron 188:Astrometry 145: (K) 134: (J) 3903:b Cygni b 3611:4C +48.48 3433:Planetary 3321:Molecular 3196:Wolf 1069 3166:N6946-BH1 3051:AFGL 2591 2204:Flamsteed 2044:α (Deneb) 1896:121357413 1888:0320-0108 1637:245854028 1548:1111.1266 1541:(1): L1. 1436:119387088 1340:119104786 1255:122700080 1155:0708.1752 1124:119363464 1116:0004-637X 955:V1687 Cyg 878:signature 796:spectral 790:SBC9 1232 586:8.4  527:(primary) 498:(primary) 334:Companion 101: (V) 3952:Exomoons 3933:KELT-20b 3616:Cygnus A 3563:Galaxies 3501:NGC 7048 3496:NGC 7027 3491:NGC 7026 3486:NGC 7008 3481:NGC 6884 3476:NGC 6881 3471:NGC 6826 3441:Abell 78 3398:NGC 6914 3331:Cygnus X 3307:NGC 6910 3302:NGC 6871 3297:NGC 6866 3292:NGC 6834 3287:NGC 6819 3282:NGC 6811 3212:clusters 3106:HAT-P-17 3096:G 208-45 3091:G 208-44 2852:86 (PH2) 2807:64 (PH1) 2372:Variable 2054:Îł (Sadr) 1573:17402120 1180:18759600 1003:hydrogen 978:infrared 945:apastron 866:infrared 846:nitrogen 838:enriched 690:☉ 672:☉ 666:35  652:☉ 612:☉ 592:☉ 291: (M 268:Distance 252:Parallax 3974:1708b I 3969:1625b I 3938:TrES-5b 3928:KELT-9b 3423:Sh2-106 3418:Sh2-101 3375:IC 5146 3348:Nebulae 3267:IC 5146 3186:WASP-48 3161:MWC 349 3156:KOI-256 3116:KELT-20 1915:Twitter 1868:Bibcode 1807:Bibcode 1805:: 952. 1766:Bibcode 1734:Bibcode 1673:Bibcode 1671:: 595. 1615:Bibcode 1553:Bibcode 1487:Bibcode 1416:Bibcode 1366:Bibcode 1320:Bibcode 1283:Bibcode 1235:Bibcode 1208:Bibcode 1160:Bibcode 1096:Bibcode 957:in the 850:silicon 818:ÎŽ Cygni 814:Îł Cygni 794:evolved 569:Details 481:−0.0039 479:+0.0036 357:−0.0035 355:+0.0037 324:Primary 55:J2000.0 52:Equinox 48:J2000.0 20:WR 140 3961:Kepler 3644:Kepler 3606:3C 438 3323:clouds 3151:KOI-81 3146:KOI-74 3111:KELT-9 2639:Kepler 2611:Gliese 2601:197037 2596:191806 2591:188753 2586:187123 2581:185435 2576:185269 2347:71 (g) 2342:68 (A) 2337:63 (f) 2327:59 (f) 2277:29 (b) 2272:28 (b) 2267:27 (b) 2262:26 (e) 2247:20 (d) 2237:16 (c) 1894:  1886:  1635:  1571:  1513:VizieR 1475:. A1. 1434:  1338:  1253:  1178:  1122:  1114:  1007:helium 937:Balmer 911:(2000) 909:et al. 874:metals 854:carbon 842:oxygen 806:Cygnus 788:star, 778:WR 140 764:SIMBAD 661:Radius 511:° 452:° 430:° 406:0.0034 402:0.9012 352:7.9241 345:Period 170:+0.40 159:−0.35 148:5.037 137:5.547 67:Cygnus 3896:Other 3887:1708b 3877:1649b 3872:1658b 3867:1652b 3862:1625b 3857:1520b 3852:1229b 3599:Other 3466:M1-92 3380:L1014 3336:DR 21 3141:KOI-5 3044:Other 2525:V2513 2520:V2214 2515:V1974 2510:V1794 2505:V1668 2500:V1500 2495:V1489 2490:V1334 2485:V1191 2480:V1143 2475:V1057 2470:V1027 2036:Bayer 2027:Stars 1952:arXiv 1892:S2CID 1724:arXiv 1633:S2CID 1605:arXiv 1569:S2CID 1543:arXiv 1507: 1477:arXiv 1432:S2CID 1406:arXiv 1336:S2CID 1310:arXiv 1251:S2CID 1176:S2CID 1150:arXiv 1120:S2CID 1086:arXiv 925:giant 810:Deneb 749:2MASS 721:V1687 507:−0.68 505:+0.70 502:42.31 476:.1825 463:epoch 446:349.1 421:119.4 384:−0.23 382:+0.22 317:Orbit 236:Dec.: 105:6.85 45:Epoch 3847:737b 3842:560b 3837:452b 3832:451b 3827:432b 3822:419b 3817:409b 3807:371b 3792:186b 3590:7013 3585:6946 3580:6801 3390:H II 3357:Dark 3262:DR 6 3249:Open 3210:Star 3010:138a 2967:1708 2962:1649 2957:1625 2952:1520 2947:1229 2629:1245 2558:8193 2553:7912 2548:7767 2543:7633 2465:V476 2460:V404 2455:V389 2450:V380 1884:ISSN 1461:Gaia 1279:2246 1204:2237 1112:ISSN 1057:JWST 963:dust 852:and 816:and 770:data 741:SBC9 641:Mass 581:Mass 564:km/s 560:−1.1 558:+1.2 555:68.5 537:km/s 531:29.3 470:MJD 426:−3.4 424:+3.7 379:8.30 164:B−V 153:U−B 121:WC7p 3787:87c 3782:78b 3777:70b 3772:69b 3767:68b 3757:61b 3752:56b 3747:47b 3742:41b 3737:40b 3732:39b 3727:36b 3722:34b 3717:33b 3712:32b 3707:28b 3702:23b 3697:22b 3692:17b 3687:16b 3682:15b 3677:11b 3572:NGC 3534:SNR 3035:150 3030:148 3025:147 3020:142 3015:140 3005:137 3000:136 2995:135 2990:134 2985:133 2942:737 2937:560 2932:452 2927:451 2922:445 2917:432 2912:419 2907:411 2902:385 2897:371 2892:289 2887:223 2882:186 2877:182 2872:167 2867:107 2624:806 2619:777 1962:doi 1948:504 1876:doi 1815:doi 1774:doi 1762:418 1720:355 1623:doi 1601:163 1561:doi 1539:742 1511:at 1497:doi 1473:616 1424:doi 1402:424 1328:doi 1306:458 1243:doi 1168:doi 1146:474 1104:doi 1082:567 1045:Sun 969:. 947:. 927:or 900:An 840:in 804:of 745:WDS 737:TYC 733:HIP 535:1.8 494:(ω) 474:993 465:(T) 450:2.5 440:(Ω) 416:(i) 397:(e) 373:(a) 347:(P) 260:mas 254:(π) 240:mas 228:mas 224:RA: 219:(ÎŒ) 3995:: 3672:6b 3667:5b 3662:3c 3657:3b 3652:2b 3516:WR 2977:WR 2862:89 2857:87 2847:84 2842:80 2837:78 2832:70 2827:69 2822:68 2817:67 2812:66 2802:63 2797:61 2792:56 2787:51 2782:47 2777:45 2772:44 2767:43 2762:42 2757:41 2752:40 2747:39 2742:36 2737:35 2732:34 2727:33 2722:32 2717:31 2712:29 2707:28 2702:27 2697:23 2692:22 2687:18 2682:17 2677:16 2672:15 2667:11 2568:HD 2535:HR 2445:KY 2440:CH 2435:BI 2430:BC 2425:AZ 2420:TT 2415:SU 2410:SS 2405:RW 2362:75 2357:74 2352:72 2332:61 2322:57 2317:56 2312:55 2307:52 2302:47 2297:41 2292:39 2287:35 2282:33 2257:23 2252:22 2242:17 2232:15 1960:. 1946:. 1942:. 1913:. 1890:. 1882:. 1874:. 1864:37 1862:. 1837:. 1813:. 1803:92 1801:. 1797:. 1772:. 1760:. 1756:. 1732:. 1718:. 1693:. 1669:80 1667:. 1645:^ 1631:. 1621:. 1613:. 1599:. 1595:. 1581:^ 1567:. 1559:. 1551:. 1537:. 1520:^ 1495:. 1485:. 1471:. 1465:. 1444:^ 1430:. 1422:. 1414:. 1400:. 1378:^ 1364:. 1360:. 1348:^ 1334:. 1326:. 1318:. 1304:. 1277:. 1273:. 1249:. 1241:. 1231:55 1229:. 1206:. 1202:. 1188:^ 1174:. 1166:. 1158:. 1144:. 1132:^ 1118:. 1110:. 1102:. 1094:. 1080:. 941:AU 888:. 862:UV 848:, 844:, 820:. 812:, 729:HD 725:BD 574:WR 545:(K 521:(K 362:yr 338:WR 300:WR 280:pc 275:ly 244:yr 232:yr 202:(R 181:WR 125:O5 123:+ 3918:c 3882:c 3812:c 3802:f 3797:e 3549:) 3338:) 2662:6 2657:5 2652:3 2647:2 2400:Y 2395:X 2390:W 2385:T 2380:R 2227:9 2222:8 2217:4 2212:2 2194:Q 2189:P 2184:ω 2179:ω 2174:ψ 2169:χ 2164:φ 2159:υ 2154:τ 2149:σ 2144:ρ 2139:π 2129:Îż 2124:o 2119:o 2114:Ο 2109:Îœ 2104:ÎŒ 2099:λ 2094:Îș 2089:Îč 2084:Îč 2079:Ξ 2074:η 2069:ζ 1998:e 1991:t 1984:v 1970:. 1964:: 1954:: 1923:. 1898:. 1878:: 1870:: 1847:. 1823:. 1817:: 1809:: 1782:. 1776:: 1768:: 1740:. 1736:: 1726:: 1703:. 1679:. 1675:: 1639:. 1625:: 1617:: 1607:: 1575:. 1563:: 1555:: 1545:: 1515:. 1505:. 1499:: 1489:: 1479:: 1459:" 1438:. 1426:: 1418:: 1408:: 1372:. 1368:: 1362:1 1342:. 1330:: 1322:: 1312:: 1289:. 1285:: 1257:. 1245:: 1237:: 1214:. 1210:: 1182:. 1170:: 1162:: 1152:: 1126:. 1106:: 1098:: 1088:: 858:K 706:K 687:L 669:R 649:M 634:O 628:K 609:L 589:M 549:) 547:2 533:± 525:) 523:1 472:1 448:± 404:± 388:″ 328:O 305:O 295:) 293:V 282:) 242:/ 230:/ 206:) 204:v

Index


Mid-Infrared Instrument
Epoch
J2000.0
Equinox
J2000.0
Constellation
Cygnus
Right ascension
Declination
Apparent magnitude
Spectral type
WC7p
O5
Apparent magnitude
Apparent magnitude
color index
color index
Variable type
WR
Astrometry
Radial velocity
Proper motion
mas
yr
mas
yr
Parallax
mas
Distance

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