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羽林軍廿四

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關於恆星系統中其他相同拜耳命名法恆星,請參見寶瓶座τ
τ2 Aquarii
Diagram showing star positions and boundaries of the Aquarius constellation and its surroundings
Location of τ1 Aquarii (circled)
觀測資料
曆元 J2000
星座 寶瓶座
星官
赤經 22h 49m 35.50157s[1]
赤緯 –13° 35′ 33.4767″[1]
視星等(V) +4.042[2]
特性
光譜分類K5 III[3]
U−B 色指數+1.948[2]
B−V 色指數+1.566[2]
天體測定
徑向速度 (Rv)+1.0[4] km/s
自行 (μ) 赤經:–13.71[1] mas/yr
赤緯:–39.03[1] mas/yr
視差 (π)10.27 ± 0.29[1] mas
距離318 ± 9 ly
(97 ± 3 pc)
詳細資料
半徑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]

寶瓶座71,即寶瓶座τ2Tau2 Aquarii、τ2 Aqr、τ2 Aquarii),是一顆寶瓶座的恆星,視星等+4.0.[2]。該恆星是一顆橙色的巨星[7]光譜類型 K5 III[3]。它的角直徑在經過周邊昏暗修正後5.12 ± 0.05 mas[8]。它的距離經由視差量測大約是318光年或97秒差距[1],半徑是太陽的53倍[5]

參考資料

  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], (原始內容存檔於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], (原始內容存檔於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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