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尾宿增二

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尾宿增二
觀測資料
曆元 J2000
星座 天蠍座
星官
赤經 16h 52m 20.14532s[1]
赤緯 −38° 01′ 03.1258″[1]
視星等(V) +3.56[2]
特性
光譜分類B2 IV[3]
U−B 色指數−0.878[2]
B−V 色指數−0.219[2]
天體測定
徑向速度 (Rv)+1.4[4] km/s
自行 (μ) 赤經:−11.09[1] mas/yr
赤緯:−23.32[1] mas/yr
視差 (π)6.88 ± 0.12[1] mas
距離474 ± 8 ly
(145 ± 3 pc)
絕對星等 (MV)−2.25[5]
詳細資料
質量8.7±0.2[6] M
半徑7.0[7] R
亮度2,385[8] L
溫度23,113[7] K
自轉速度 (v sin i)58[9] km/s
年齡18.5±3.2[6] Myr
其他命名
Pipirima, μ² Scorpii, CD−37° 11037, HD 151985, HIP 82545, HR 6252, SAO 208116.[10]
參考資料庫
SIMBAD資料

尾宿增二天蠍座μ2)是一顆位於天蠍座恆星,其視星等為3.56等,亮度足以用肉眼看到。根據視差測量值,尾宿增二與太陽的距離約為474光年,也是天蠍-半人馬星協成員之一[11]

性質

尾宿增二是一顆藍白色B型亞巨星,恆星分類為B2 IV[3] 。跟據天文學家估計,它的半徑是太陽的7倍,質量幾乎是太陽的9倍[6],光度是太陽的2,385倍[8]。外層大氣的有效溫度為23,113 K[7]。它大約有1,850萬年的歷史,並以58公里/秒的速度自轉[9]

參考文獻

  1. ^ 1.0 1.1 1.2 1.3 1.4 van Leeuwen, F., Validation of the new Hipparcos reduction, Astronomy and Astrophysics, November 2007, 474 (2): 653–664, Bibcode:2007A&A...474..653V, arXiv:0708.1752可免費查閱, doi:10.1051/0004-6361:20078357. 
  2. ^ 2.0 2.1 2.2 Gutierrez-Moreno, Adelina; Moreno, Hugo, A photometric investigation of the Scorpio-Centaurus association, Astrophysical Journal Supplement, June 1968, 15: 459, Bibcode:1968ApJS...15..459G, doi:10.1086/190168. 
  3. ^ 3.0 3.1 Hiltner, W. A.; et al, MK Spectral Types for Bright Southern OB Stars, The Astrophysical Journal, July 1969, 157: 313, Bibcode:1969ApJ...157..313H, doi:10.1086/150069. 
  4. ^ Evans, D. S., Batten, Alan Henry; Heard, John Frederick , 編, The Revision of the General Catalogue of Radial Velocities, Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30 (University of Toronto: International Astronomical Union), June 20–24, 1966, Bibcode:1967IAUS...30...57E. 
  5. ^ Anderson, E.; Francis, Ch., XHIP: An extended hipparcos compilation, Astronomy Letters, 2012, 38 (5): 331, Bibcode:2012AstL...38..331A, arXiv:1108.4971可免費查閱, doi:10.1134/S1063773712050015. 
  6. ^ 6.0 6.1 6.2 Tetzlaff, N.; et al, A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun, Monthly Notices of the Royal Astronomical Society, 2011, 410: 190–200, Bibcode:2011MNRAS.410..190T, arXiv:1007.4883可免費查閱, doi:10.1111/j.1365-2966.2010.17434.x. 
  7. ^ 7.0 7.1 7.2 Underhill, A. B.; et al, Effective temperatures, angular diameters, distances and linear radii for 160 O and B stars, Monthly Notices of the Royal Astronomical Society, November 1979, 189: 601–605, Bibcode:1979MNRAS.189..601U, doi:10.1093/mnras/189.3.601. 
  8. ^ 8.0 8.1 McDonald, I.; et al, Fundamental Parameters and Infrared Excesses of Hipparcos Stars, Monthly Notices of the Royal Astronomical Society, 2012, 427 (1): 343–57, Bibcode:2012MNRAS.427..343M, arXiv:1208.2037可免費查閱, doi:10.1111/j.1365-2966.2012.21873.x. 
  9. ^ 9.0 9.1 Uesugi, Akira; Fukuda, Ichiro, Catalogue of rotational velocities of the stars, Contributions from the Institute of Astrophysics and Kwasan Observatory (University of Kyoto), 1970, Bibcode:1970crvs.book.....U. 
  10. ^ mu.02 Sco -- Variable Star, SIMBAD Astronomical Database (Centre de Données astronomiques de Strasbourg), [2016-09-20], (原始內容存檔於2020-11-05). 
  11. ^ 引用錯誤:沒有為名為Bobylev2007的參考文獻提供內容

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