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

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]

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]

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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