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羽林军廿四

维基百科,自由的百科全书
关于恒星系统中其他相同拜耳命名法恒星,请参见宝瓶座τ
τ2 Aquarii
Diagram showing star positions and boundaries of the Aquarius constellation and its surroundings
Location of τ1 Aquarii (circled)
观测资料
历元 J2000
星座 宝瓶座
星官
赤经 22h 49m 35.50157s[1]
赤纬 –13° 35′ 33.4767″[1]
视星等(V) +4.042[2]
特性
光谱分类K5 III[3]
U−B 色指数+1.948[2]
B−V 色指数+1.566[2]
天体测定
径向速度 (Rv)+1.0[4] km/s
自行 (μ) 赤经:–13.71[1] mas/yr
赤纬:–39.03[1] mas/yr
视差 (π)10.27 ± 0.29[1] mas
距离318 ± 9 ly
(97 ± 3 pc)
详细资料
半径53[5] R
其他命名
Tau Aquarii, 71 Aquarii, BD–14 6354, FK5 861, HD 216032, HIP 112716, HR 8679, NSV 14329, SAO 165321.[6]

宝瓶座71,即宝瓶座τ2Tau2 Aquarii、τ2 Aqr、τ2 Aquarii),是一颗宝瓶座的恒星,视星等+4.0.[2]。该恒星是一颗橙色的巨星[7]光谱类型 K5 III[3]。它的角直径在经过周边昏暗修正后5.12 ± 0.05 mas[8]。它的距离经由视差量测大约是318光年或97秒差距[1],半径是太阳的53倍[5]

参考资料

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  1. ^ 1.0 1.1 1.2 1.3 1.4 1.5 van Leeuwen, F., Validation of the new Hipparcos reduction, Astronomy and Astrophysics, November 2007, 474 (2): 653–664, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357. 
  2. ^ 2.0 2.1 2.2 2.3 Gutierrez-Moreno, Adelina; et al, A System of photometric standards 1, Publicaciones Universidad de Chile, Department de Astronomy: 1–17, 1966, Bibcode:1966PDAUC...1....1G. 
  3. ^ 3.0 3.1 Houk, Nancy, Michigan catalogue of two-dimensional spectral types for the HD stars 4, Ann Arbor: Dept. of Astronomy, University of Michigan, 1978, Bibcode:1988mcts.book.....H. 
  4. ^ Wielen, R.; et al, Sixth Catalogue of Fundamental Stars (FK6). Part I. Basic fundamental stars with direct solutions (35), Astronomisches Rechen-Institut Heidelberg, 1999, Bibcode:1999VeARI..35....1W. 
  5. ^ 5.0 5.1 Lang, Kenneth R., Astrophysical formulae, Astronomy and astrophysics library 1 3, Birkhäuser, 2006, ISBN 3-540-29692-1 . The radius (R*) is given by:
  6. ^ tau Aqr -- Star in double system, SIMBAD (Centre de Données astronomiques de Strasbourg), [2012-02-08], (原始内容存档于2021-02-16) 
  7. ^ The Colour of Stars, Australia Telescope, Outreach and Education (Commonwealth Scientific and Industrial Research Organisation), December 21, 2004 [2012-01-16], (原始内容存档于2012-03-10) 
  8. ^ Richichi, A.; Percheron, I.; Khristoforova, M., CHARM2: An updated Catalog of High Angular Resolution Measurements, Astronomy and Astrophysics, February 2005, 431: 773–777, Bibcode:2005A&A...431..773R, doi:10.1051/0004-6361:20042039 

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