羽林軍廿四

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

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]

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]

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 

外部連結