Knowledge (XXG)

T Coronae Borealis

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website reported a sustained brightening since February 2015 from magnitude 10.5 to about 9.2. A similar event was reported in 1938, followed by another outburst in 1946. By June 2018, the star had dimmed slightly but still remained at an unusually high level of activity. By mid-2023, it faded by
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of about 10, which is near the limit of typical binoculars. Well documented outbursts have been seen twice, reaching magnitude 2.0 on May 12, 1866 and magnitude 3.0 on February 9, 1946, though a more recent paper shows the 1866 outburst with a possible peak range of magnitude 2.5 Â± 0.5.
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0.35 magnitude; the lowest brightness seen since 2016. A similar dimming occurred in the year before the 1946 outburst, indicating an eruption before September 2024. As of September 2024, such a nova has not yet been observed, although it is believed to be imminent.
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Luna, GJM; Mukai, K.; Sokoloski, J. L.; Nelson, T.; Kuin, P.; Segreto, A.; Cusumano, G.; Jaque Arancibia, M.; Nuñez, N. E. (2018). "Dramatic change in the boundary layer in the symbiotic recurrent nova T Coronae Borealis".
1255:"The Night Sky Will Soon Get 'a New Star.' Here's How to See It. - A nova named T Coronae Borealis lit up the night about 80 years ago, and astronomers say it's expected to put on another show in the coming months" 1225:
Starrfield, Sumner; Bose, Maitrayee; Woodward, Charles E.; Perron, Isabelle; Shaw, Gargi; Evans, Aneurin; Iliadis, Christian; Hix, W. Raphael (2024-06-01). "The evolution leading to a thermonuclear runaway".
1921:"The B & V light curves for recurrent nova T CrB from 1842-2022, the unique pre- and post-eruption high-states, the complex period changes, and the upcoming eruption in 2025.5 ± 1.3" 999:
Linford, Justin D.; Chomiuk, Laura; Sokoloski, Jennifer L.; Weston, Jennifer H. S.; Van Der Horst, Alexander J.; Mukai, Koji; Barrett, Paul; Mioduszewski, Amy J.; Rupen, Michael (2019).
2134: 1416: 648:, all hidden inside a dense cloud of material from the red giant. When the system is quiescent, the red giant dominates the visible light output and the system appears as an 2446: 514: 3272: 3262: 679:
The two components of the system orbit each other about every 228 days. The orbit is almost circular and is inclined at an angle of 67°. The stars are separated by
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output. During outbursts, the transfer of material to the hot component increases greatly, the hot component expands, and the luminosity of the system increases.
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Maslennikova, N. A.; Tatarnikov, A. M.; Tatarnikova, A. A.; Dodin, A. V.; Shenavrin, V. I.; Burlak, M. A.; Zheltoukhov, S. G.; Strakhov, I. A. (2023-10-01).
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Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)".
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Schaefer, Bradley E. (16 November 2023). "The recurrent nova T CrB had prior eruptions observed near December 1787 and October 1217 AD".
2614: 1872:"An Independent Discovery of the 1946 Eruption of the Recurrent Nova T Coronae Borealis and an Early Prediction of a Future Outburst" 1980:"Recurrent nova T CrB has just started its Pre-eruption Dip in March/April 2023, so the eruption should occur around 2024.4 +- 0.3" 2722: 3277: 56: 668: 2695: 2669: 2664: 2659: 581: 1067:
Stanishev, V.; Zamanov, R.; Tomov, N.; Marziani, P. (2004). "Hα variability of the recurrent nova T Coronae Borealis".
584:, though it had been observed earlier as a 10th magnitude star. It may have been observed in 1217 and in 1787 as well. 2220: 846:
Shenavrin, V. I.; Taranova, O. G.; Nadzhip, A. E. (2011). "Search for and study of hot circumstellar dust envelopes".
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T Coronae Borealis based on a description given by Kraft using the updated mass ratio given by Stanishev
2814: 2585: 2252: 1417:"Evidence of mysterious 'recurring nova' that could reappear in 2024 found in medieval manuscript from 1217" 2624: 1844: 1796: 1634:
IƂkiewicz, Krystian; MikoƂajewska, Joanna; Stoyanov, Kiril; Manousakis, Antonios; Miszalski, Brent (2016).
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Schaefer, Bradley E. (2010). "Comprehensive Photometric Histories of All Known Galactic Recurrent Novae".
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Schaefer, Bradley E.; Kloppenborg, Brian; Waagen, Elizabeth O.; Observers, The Aavso (2023-06-01).
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ToalĂĄ, JesĂșs A.; GonzĂĄlez-MartĂ­n, Omaira; Sacchi, Andrea; Vasquez-Torres, Diego A. (2024-08-01).
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Pourbaix, D.; Tokovinin, A. A.; Batten, A. H.; Fekel, F. C.; Hartkopf, W. I.; Levato, H.;
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Fekel, Francis C.; Joyce, Richard R.; Hinkle, Kenneth H.; Skrutskie, Michael F. (2000).
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containing a large cool component and a smaller hot component. The cool component is a
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of T Coronae Borealis during the time surrounding its 1946 eruption, plotted from
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Wallerstein, George; Tanya Harrison; Ulisse Munari; Andrew Vanture (11 May 2008).
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VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S
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is dimmer than about 120 stars in the night sky. It is sometimes nicknamed the
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Wallerstein, George; Harrison, Tanya; Munari, Ulisse; Vanture, Andrew (2008).
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Schaefer, Bradley E. (2009). "Orbital Periods for Three Recurrent Novae".
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giant. The hot component contributes some emission and dominates the
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that transfers material to the hot component. The hot component is a
3105: 2503: 2341: 2283: 1001:"T CRB: Radio Observations during the 2016-2017 "Super-active" State" 803: 536: 437: 370: 256: 2156: 2129: 2084: 2027: 1937: 1708: 1652: 1619: 1594: 1463: 1438: 1376: 1348: 1312: 1287: 1202: 1177: 1017: 975: 950: 766: 3091: 1636:"Active phases and flickering of a symbiotic recurrent nova T CrB" 1492: 1134: 658: 623: 601: 591: 519: 268: 3006: 2742: 2205: 614: 566: 220: 204: 2684: 2209: 708:
2026-2027 (made in 1946 either by N.F.H.Knight or W.M. Lindley)
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Data Release 3. Summary of the content and survey properties"
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Beginning January 2024 to Mid August 2024 (made in June 2023)
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Mid February 2024 to End September 2026 (made in March 2023)
1823:"NASA, Global Astronomers Await Rare Nova Explosion - NASA" 2199: 1797:"T Coronae Borealis nova event guide and how to prepare" 744:
Vallenari, A.; et al. (Gaia collaboration) (2023).
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Publications of the Astronomical Society of the Pacific
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Publications of the Astronomical Society of the Pacific
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Publications of the Astronomical Society of the Pacific
671:. Up is brighter and down is fainter. Day numbers are 1439:"High-Dispersion Spectrograms of T Coronae Borealis" 3190: 3181: 3151: 3113: 3104: 3076: 3028: 3019: 2979: 2956: 2893: 2873: 2750: 2741: 2582: 2517: 2480: 2436: 2399: 2263: 1876:
Research Notes of the American Astronomical Society
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Recurrent nova in the constellation Corona Borealis
2072:Monthly Notices of the Royal Astronomical Society 1925:Monthly Notices of the Royal Astronomical Society 1843:Pearson, Ezzy; Lintott, Chris (August 20, 2024). 1776:. American Association of Variable Star Observers 1640:Monthly Notices of the Royal Astronomical Society 1327:Barnard, E. E. (1907). "Nova T Coronae of 1866". 580:. It was first discovered in outburst in 1866 by 2173:R and T Coronae Borealis: Two Stellar Opposites 44:Location of T Coronae Borealis (circled in red) 1768:Schaefer, B.E.; Kloppenborg, B.; Waagen, E.O. 667:T CrB from 1 Jan 2008 to 17 Nov 2010, showing 2696: 2306:(Sample return from lunar far side, May-June) 2221: 1228:Bulletin of the American Astronomical Society 1171: 1169: 8: 1750:. Sky & Telescope website. 20 April 2016 1588: 1586: 95:+25° 55′ 12.613″ 1595:"The Binary System Nova T Coronae Borealis" 1480:The Astrophysical Journal Supplement Series 1062: 1060: 1058: 1056: 1054: 3187: 3110: 3025: 2747: 2703: 2689: 2681: 2514: 2228: 2214: 2206: 2202:(get recent magnitude estimates for T CrB) 2155: 2101: 2083: 2026: 1954: 1936: 1895: 1707: 1669: 1651: 1618: 1491: 1462: 1375: 1311: 1201: 1133: 1080: 1034: 1016: 994: 992: 990: 988: 986: 974: 906: 783: 765: 739: 737: 735: 733: 613:Even when at peak magnitude of 2.5, this 55:J2000       1288:"The Light-Curves of T Coronae Borealis" 3273:Astronomical objects discovered in 1866 3263:Objects with variable star designations 1415:Thompson, Joanna (September 15, 2023). 944: 942: 729: 720:End of October 2024 (made in June 2024) 192: 1253:Andrews, Robin George (8 March 2024). 814: 812: 25: 7: 2728:Corona Borealis in Chinese astronomy 1364:Journal for the History of Astronomy 2733:Hercules–Corona Borealis Great Wall 1919:Schaefer, Bradley E. (2023-09-01). 1770:"Announcing T CrB pre-eruption dip" 208: 717:January 2024 (made in August 2023) 14: 1748:"Is T CrB About to Blow its Top?" 1267:from the original on 8 March 2024 2723:List of stars in Corona Borealis 2712:Constellation of Corona Borealis 2655: 2654: 2643: 2584: 2521: 2389: 2267: 669:rotating ellipsoidal variability 36: 800:Gaia DR3 record for this source 235:1.0920 Â± 0.0275  3258:Henry Draper Catalogue objects 1534:. SIMBAD Astronomical Database 704:Predictions of the next nova: 1: 2615:C/2023 A3 (Tsuchinshan–ATLAS) 2670:Category:2025 in outer space 2665:Category:2024 in outer space 2660:Category:2023 in outer space 1870:Shears, J. H. (2024-06-01). 1726:10.1051/0004-6361/201833747 1552:Proctor, Mary (June 1897). 1510:10.1088/0067-0049/187/2/275 1437:Sanford, Roscoe F. (1949). 1152:10.1088/0004-637X/697/1/721 785:10.1051/0004-6361/202243940 3309: 1696:Astronomy and Astrophysics 1099:10.1051/0004-6361:20034623 1069:Astronomy and Astrophysics 925:10.1051/0004-6361:20041213 895:Astronomy and Astrophysics 754:Astronomy and Astrophysics 18: 2718: 2638: 2509:Porphyrion (radio galaxy) 2447:Asteroid close approaches 2387: 2241: 2200:Check Recent Observations 2045:10.1134/S1063773723090037 1984:The Astronomer's Telegram 1593:Kraft, Robert P. (1958). 1394:10.1177/00218286231200492 1122:The Astrophysical Journal 1005:The Astrophysical Journal 868:10.1134/S1063772911010070 529: 493: 486: 443: 343: 338: 267: 263: 162: 155: 112: 49: 31: 1897:10.3847/2515-5172/ad566b 1036:10.3847/1538-4357/ab3c62 955:The Astronomical Journal 19:Not to be confused with 2195:, www.daviddarling.info 2175:at Sky & Telescope 1718:2018A&A...619A..61L 1286:Pettit, Edison (1946). 1091:2004A&A...415..609S 917:2004A&A...424..727P 776:2023A&A...674A...1G 119:Evolutionary stage 102:Apparent magnitude 3278:Durchmusterung objects 2650:Outer space portal 2103:10.1093/mnras/stae1579 694:On 20 April 2016, the 676: 629: 605: 179:−27.79 km/s 2625:C/2024 E1 (Wierzchos) 2278:Peregrine Mission One 1956:10.1093/mnras/stad735 1801:Sky at Night Magazine 1671:10.1093/mnras/stw1837 1599:Astrophysical Journal 1443:Astrophysical Journal 1329:Astrophysical Journal 690:2016–present activity 663:AAVSO light curve of 662: 627: 608:T CrB normally has a 595: 3053:ρ Coronae Borealis b 3048:Îż Coronae Borealis b 3043:Îș Coronae Borealis b 3038:Δ Coronae Borealis b 2265:Space probe launches 21:Tau Coronae Borealis 2148:2008PASP..120..492W 2094:2024MNRAS.532.1421T 2037:2023AstL...49..501M 1996:2023ATel16107....1S 1947:2023MNRAS.524.3146S 1888:2024RNAAS...8..157S 1662:2016MNRAS.462.2695I 1611:1958ApJ...127..625K 1570:1897PA......5...97P 1502:2010ApJS..187..275S 1455:1949ApJ...109...81S 1386:2023JHA....54..436S 1341:1907ApJ....25..279B 1304:1946PASP...58..153P 1240:2024AAS...24413201S 1194:2008PASP..120..492W 1144:2009ApJ...697..721S 1027:2019ApJ...884....8L 967:2000AJ....119.1375F 860:2011ARep...55...31S 833:2009yCat....102025S 697:Sky & Telescope 530:Database references 28: 27:T Coronae Borealis 2570:Teegarden's Star d 2179:2012-04-06 at the 1554:"Heavens for June" 1260:The New York Times 677: 630: 606: 551:T Coronae Borealis 488:Other designations 145:Variable type 135:Spectral type 26: 3293:Hipparcos objects 3235: 3234: 3231: 3230: 3177: 3176: 3100: 3099: 3015: 3014: 3007:XO-1 (Moldoveanu) 2678: 2677: 2630:C/2024 G3 (ATLAS) 2578: 2577: 2323:Lunar Trailblazer 2015:Astronomy Letters 1558:Popular Astronomy 848:Astronomy Reports 644:surrounded by an 557:), nicknamed the 548: 547: 522:J15593015+2555126 3300: 3188: 3111: 3026: 2748: 2705: 2698: 2691: 2682: 2658: 2657: 2648: 2647: 2646: 2588: 2525: 2515: 2472: 2457: 2429: 2427: 2426: 2417: 2415: 2414: 2393: 2271: 2230: 2223: 2216: 2207: 2169: 2159: 2142:(867): 492–497. 2116: 2115: 2105: 2087: 2078:(2): 1421–1433. 2063: 2057: 2056: 2030: 2006: 2000: 1999: 1975: 1969: 1968: 1958: 1940: 1931:(2): 3146–3165. 1916: 1910: 1909: 1899: 1867: 1861: 1860: 1858: 1856: 1849:BBC Sky at Night 1840: 1834: 1833: 1831: 1830: 1819: 1813: 1812: 1810: 1808: 1792: 1786: 1785: 1783: 1781: 1765: 1759: 1758: 1756: 1755: 1744: 1738: 1737: 1711: 1690: 1684: 1683: 1673: 1655: 1631: 1625: 1624: 1622: 1590: 1581: 1580: 1578: 1576: 1549: 1543: 1542: 1540: 1539: 1528: 1522: 1521: 1495: 1475: 1469: 1468: 1466: 1434: 1428: 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Live Science 1407: 1370:(4): 436–455. 1354: 1349:10.1086/141446 1319: 1313:10.1086/125797 1278: 1245: 1217: 1203:10.1086/587965 1165: 1128:(1): 721–729. 1112: 1075:(2): 609–616. 1050: 982: 976:10.1086/301260 938: 901:(2): 727–732. 891:Morrell, N. 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2186: 2182: 2178: 2174: 2171: 2167: 2163: 2158: 2153: 2149: 2145: 2141: 2137: 2136: 2131: 2126: 2125: 2121: 2113: 2109: 2104: 2099: 2095: 2091: 2086: 2081: 2077: 2073: 2069: 2062: 2059: 2054: 2050: 2046: 2042: 2038: 2034: 2029: 2024: 2020: 2016: 2012: 2005: 2002: 1997: 1993: 1989: 1985: 1981: 1974: 1971: 1966: 1962: 1957: 1952: 1948: 1944: 1939: 1934: 1930: 1926: 1922: 1915: 1912: 1907: 1903: 1898: 1893: 1889: 1885: 1881: 1877: 1873: 1866: 1863: 1850: 1846: 1839: 1836: 1824: 1818: 1815: 1802: 1798: 1791: 1788: 1775: 1771: 1764: 1761: 1749: 1743: 1740: 1735: 1731: 1727: 1723: 1719: 1715: 1710: 1705: 1701: 1697: 1689: 1686: 1681: 1677: 1672: 1667: 1663: 1659: 1654: 1649: 1645: 1641: 1637: 1630: 1627: 1621: 1616: 1612: 1608: 1604: 1600: 1596: 1589: 1587: 1583: 1571: 1567: 1563: 1559: 1555: 1548: 1545: 1533: 1532:"Vmag<2.5" 1527: 1524: 1519: 1515: 1511: 1507: 1503: 1499: 1494: 1489: 1485: 1481: 1474: 1471: 1465: 1460: 1456: 1452: 1448: 1444: 1440: 1433: 1430: 1418: 1411: 1408: 1403: 1399: 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639: 635: 634:binary system 626: 622: 620: 616: 611: 603: 599: 594: 587: 585: 583: 579: 576: 575:constellation 572: 568: 564: 560: 556: 552: 544: 541: 539: 538: 534: 533: 528: 521: 517: 84129, 516: 512: 509: 78322, 508: 504: 498: 492: 489: 485: 482: 473: 471: 468: 467: 464: 455: 453: 452: 448: 447: 442: 439: 435: 433: 432: 428: 427: 424: 420: 418: 416: 412: 408: 407: 404: 395: 393: 392: 388: 387: 384: 375: 373: 372: 368: 367: 364: 355: 353: 352: 348: 347: 342: 337: 333: 331: 329: 325: 324: 320: 318: 316: 312: 311: 307: 302: 299: 297: 292: 291: 287: 282: 280: 278: 274: 273: 270: 266: 262: 258: 253: 249: 247: 246: 242: 241: 238: 234: 232: 230: 226: 225: 222: 218: 206: 202: 191: 189: 187: 186:Proper motion 183: 182: 178: 176: 170: 166: 165: 161: 158: 154: 151: 148: 146: 143: 142: 138: 136: 133: 132: 129: 125: 122: 120: 117: 116: 111: 107: 103: 99: 98: 94: 92: 89: 88: 84:15 59 30.1622 82: 79: 75: 74: 71: 68: 66: 65:Constellation 63: 62: 58: 54: 48: 39: 30: 22: 3288:White dwarfs 2912: 2882: 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Our Media 1795:Todd, Ian. 1646:(3): 2695. 1564:: 104–105. 961:(3): 1375. 654:ultraviolet 642:white dwarf 632:T CrB is a 598:light curve 588:Description 571:light-years 563:binary star 444:White dwarf 436:3,600  431:Temperature 328:Inclination 128:white dwarf 91:Declination 3242:Categories 3021:Exoplanets 2992:Gliese 611 2610:13P/Olbers 2519:Exoplanets 2382:(December) 2376:(November) 2370:(November) 2295:Blue Ghost 2193:Blaze Star 2085:2405.08980 2028:2308.10011 1938:2303.04933 1882:(6): 157. 1829:2024-07-23 1780:18 January 1754:2017-08-06 1709:1807.01304 1653:1607.06804 1538:2010-06-25 1423:2024-03-21 1377:2308.13668 1018:1909.13858 767:2208.00211 725:References 681:0.54  673:Julian day 619:Blaze Star 559:Blaze Star 474:~100  470:Luminosity 456:1.37  413:(log  391:Luminosity 356:1.12  304:0.54  157:Astrometry 3084:GJ 3929 b 2875:Flamsteed 2504:asteroids 2502:Water on 2437:Selected 2364:(October) 2358:(October) 2338:Queqiao 2 2304:Chang'e 6 2291:(January) 2280:(January) 2166:106406607 2112:0035-8711 2053:1063-7737 1965:0035-8711 1906:2515-5172 1734:119078482 1702:(1): 61. 1680:119104759 1518:119294221 1493:0912.4426 1402:0021-8286 1212:106406607 1135:0903.1349 1045:203593955 933:119387088 876:122700080 794:244398875 638:red giant 610:magnitude 499:+26° 2765 421:2.0  396:655  344:Red giant 124:Red giant 108:2.0–10.8 104: (V) 3106:Galaxies 3002:NGC 6002 2987:ADS 9731 2895:Variable 2553:HD 63433 2537:HD 48948 2493:Gaia BH3 2368:ESCAPADE 2356:Juventas 2314:EagleCam 2177:Archived 1807:18 March 1265:Archived 1160:16087253 1011:(1): 8. 480:☉ 462:☉ 402:☉ 382:☉ 376:75  362:☉ 334:67° 245:Distance 229:Parallax 139:M3III+p 3169:IC 4539 3164:IC 1166 2997:GJ 3929 2583:Comets 2468:2022 YO 2462:2011 MD 2453:2020 BX 2422:2024 RW 2410:2024 BX 2344:(March) 2255: Â» 2246:«  2198:AAVSO: 2144:Bibcode 2090:Bibcode 2033:Bibcode 1992:Bibcode 1943:Bibcode 1884:Bibcode 1714:Bibcode 1658:Bibcode 1607:Bibcode 1605:: 625. 1566:Bibcode 1498:Bibcode 1451:Bibcode 1382:Bibcode 1337:Bibcode 1335:: 279. 1300:Bibcode 1271:9 March 1236:Bibcode 1190:Bibcode 1140:Bibcode 1107:3000175 1087:Bibcode 1023:Bibcode 963:Bibcode 913:Bibcode 856:Bibcode 829:Bibcode 772:Bibcode 561:, is a 339:Details 57:Equinox 2966:140913 2884:23 Her 2352:Milani 2284:XPoSat 2164:  2110:  2051:  1963:  1904:  1732:  1678:  1575:2 July 1516:  1449:: 81. 1400:  1210:  1158:  1105:  1043:  931:  874:  804:VizieR 792:  760:: A1. 537:SIMBAD 371:Radius 277:Period 215:  213:12.016 211:  199:  197:−4.461 195:  59:J2000 3191:Abell 3152:Other 3077:Other 3030:Bayer 2980:Other 2752:Bayer 2743:Stars 2374:VIPER 2333:IHP-1 2162:S2CID 2080:arXiv 2023:arXiv 1990:: 1. 1988:16107 1933:arXiv 1803:. BBC 1774:AAVSO 1730:S2CID 1704:arXiv 1676:S2CID 1648:arXiv 1514:S2CID 1488:arXiv 1372:arXiv 1208:S2CID 1156:S2CID 1130:arXiv 1103:S2CID 1077:arXiv 1041:S2CID 1013:arXiv 929:S2CID 903:arXiv 872:S2CID 798: 790:S2CID 762:arXiv 602:AAVSO 555:T CrB 520:2MASS 269:Orbit 209:Dec.: 53:Epoch 3218:2162 3213:2142 3208:2067 3203:2065 3198:2061 3143:6122 3138:6120 3133:6104 3128:6086 3123:6085 2439:NEOs 2348:Hera 2328:IM-3 2319:IM-2 2310:IM-1 2253:2025 2248:2023 2108:ISSN 2049:ISSN 1961:ISSN 1902:ISSN 1857:2024 1809:2024 1782:2024 1577:2024 1398:ISSN 1273:2024 748:Gaia 604:data 596:The 567:nova 543:data 451:Mass 351:Mass 3115:NGC 2152:doi 2140:120 2098:doi 2076:532 2041:doi 1951:doi 1929:524 1892:doi 1722:doi 1700:619 1666:doi 1644:462 1615:doi 1603:127 1506:doi 1484:187 1459:doi 1447:109 1390:doi 1345:doi 1308:doi 1198:doi 1186:120 1148:doi 1126:697 1095:doi 1073:415 1031:doi 1009:884 971:doi 959:119 921:doi 899:424 864:doi 802:at 780:doi 758:674 515:SAO 507:HIP 423:cgs 330:(i) 321:0.0 317:(e) 298:(a) 279:(P) 237:mas 231:(π) 217:mas 201:mas 193:RA: 188:(ÎŒ) 3244:: 2958:HD 2948:UW 2943:TY 2938:RS 2933:RR 2668:— 2662:— 2455:12 2354:/ 2350:/ 2340:/ 2321:/ 2312:/ 2297:M1 2160:. 2150:. 2138:. 2132:. 2106:. 2096:. 2088:. 2074:. 2070:. 2047:. 2039:. 2031:. 2019:49 2017:. 2013:. 1986:. 1982:. 1959:. 1949:. 1941:. 1927:. 1923:. 1900:. 1890:. 1878:. 1874:. 1847:. 1799:. 1772:. 1728:. 1720:. 1712:. 1698:. 1674:. 1664:. 1656:. 1642:. 1638:. 1613:. 1601:. 1597:. 1585:^ 1560:. 1556:. 1512:. 1504:. 1496:. 1482:. 1457:. 1445:. 1441:. 1396:. 1388:. 1380:. 1368:54 1366:. 1343:. 1333:25 1331:. 1306:. 1296:58 1294:. 1290:. 1263:. 1257:. 1232:56 1230:. 1206:. 1196:. 1184:. 1180:. 1168:^ 1154:. 1146:. 1138:. 1124:. 1101:. 1093:. 1085:. 1071:. 1053:^ 1039:. 1029:. 1021:. 1007:. 1003:. 985:^ 969:. 957:. 953:. 941:^ 927:. 919:. 911:. 897:. 870:. 862:. 852:55 850:. 827:. 823:. 811:^ 788:. 778:. 770:. 756:. 752:. 732:^ 686:. 683:AU 650:M3 621:. 511:HR 503:HD 501:, 497:BD 306:AU 257:pc 252:ly 221:yr 205:yr 171:(R 126:+ 3088:c 3068:e 3063:d 3058:c 2928:W 2923:V 2918:U 2913:T 2908:S 2903:R 2865:υ 2860:τ 2855:σ 2850:ρ 2845:π 2840:Îż 2835:Ο 2830:Îœ 2825:Îœ 2820:ÎŒ 2815:λ 2810:Îș 2805:Îč 2800:Ξ 2795:η 2790:ζ 2785:ζ 2780:Δ 2775:ÎŽ 2770:Îł 2704:e 2697:t 2690:v 2558:d 2547:d 2544:c 2541:b 2470:1 2425:1 2413:1 2394:h 2229:e 2222:t 2215:v 2168:. 2154:: 2146:: 2114:. 2100:: 2092:: 2082:: 2055:. 2043:: 2035:: 2025:: 1998:. 1994:: 1967:. 1953:: 1945:: 1935:: 1908:. 1894:: 1886:: 1880:8 1859:. 1832:. 1811:. 1784:. 1757:. 1736:. 1724:: 1716:: 1706:: 1682:. 1668:: 1660:: 1650:: 1623:. 1617:: 1609:: 1579:. 1568:: 1562:5 1541:. 1520:. 1508:: 1500:: 1490:: 1467:. 1461:: 1453:: 1426:. 1404:. 1392:: 1384:: 1374:: 1351:. 1347:: 1339:: 1316:. 1310:: 1302:: 1275:. 1242:. 1238:: 1214:. 1200:: 1192:: 1162:. 1150:: 1142:: 1132:: 1109:. 1097:: 1089:: 1079:: 1047:. 1033:: 1025:: 1015:: 979:. 973:: 965:: 935:. 923:: 915:: 905:: 878:. 866:: 858:: 835:. 831:: 825:1 806:. 796:. 782:: 774:: 764:: 746:" 675:. 553:( 477:L 459:M 438:K 417:) 415:g 399:L 379:R 359:M 286:d 259:) 219:/ 203:/ 175:) 173:v 23:.

Index

Tau Coronae Borealis

Epoch
Equinox
Constellation
Corona Borealis
Right ascension
Declination
Apparent magnitude
Evolutionary stage
Red giant
white dwarf
Spectral type
Variable type
recurrent nova
Astrometry
Radial velocity
Proper motion
mas
yr
mas
yr
Parallax
mas
Distance
ly
pc
Orbit
Period
d

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