西上將

西上將σ Leo / 狮子座σ)也称太微右垣二,是狮子座的一颗蓝白恒星,在中国古代星官中属于太微垣的太微右垣。它视星等为+4.05,是狮子座的第四亮星,光谱型B9.5V。

西上將
觀測資料
曆元 J2000
星座 狮子座
星官
赤經 11h 21m 08.1943s[1]
赤緯 +06° 01 45.558[1]
視星等(V) 4.046[2]
特性
光谱分类B9.5 Vs[3]
U−B 色指数–0.12[4]
B−V 色指数–0.06[4]
天体测定
徑向速度 (Rv)–5.3[5] km/s
自行 (μ) 赤经:–91.76[1] mas/yr
赤纬:–12.83[1] mas/yr
视差 (π)15.24 ± 0.81[1] mas
距离210 ± 10 ly
(66 ± 3 pc)
绝对星等 (MV)−0.10[6]
詳細資料
質量2.76[7] M
半徑3.3[8] R
表面重力 (log g)3.83±0.03[9]
亮度133[6] L
溫度10,250[8] K
金属量 [Fe/H]+0.0[8] dex
自轉速度 (v sin i)70[10] km/s
年齡293[7] Myr
其他命名
σ Leo77 LeoBD−06° 2437FK5 427、HD 98664、HIP 55434、HR 4386、SAO 118804[11]
參考資料庫
SIMBADdata

参考文献

  1. Perryman, M. A. C.; 等. . Astronomy & Astrophysics. April 1997, 323: L49–L52. Bibcode:1997A&A...323L..49P.
  2. Cousins, A. W. J., , South Africa Astronomical Observatory Circular, 1984, 8: 59−67, Bibcode:1984SAAOC...8...59C.
  3. Chini, R.; 等, , Monthly Notices of the Royal Astronomical Society, August 2012, 424 (3): 1925−1929, Bibcode:2012MNRAS.424.1925C, arXiv:1205.5238, doi:10.1111/j.1365-2966.2012.21317.x
  4. Johnson, H. L.; Iriarte, B.; Mitchell, R. I.; Wisniewskj, W. Z. . Communications of the Lunar and Planetary Laboratory. 1966, 4 (99). Bibcode:1966CoLPL...4...99J.
  5. Wilson, Ralph Elmer. . Washington: Carnegie Institution of Washington. 1953. Bibcode:1953GCRV..C......0W.
  6. Anderson, E.; Francis, Ch., , Astronomy Letters, 2012, 38 (5): 331, Bibcode:2012AstL...38..331A, arXiv:1108.4971, doi:10.1134/S1063773712050015.
  7. David, Trevor J.; Hillenbrand, Lynne A., , The Astrophysical Journal, 2015, 804 (2): 146, Bibcode:2015ApJ...804..146D, arXiv:1501.03154, doi:10.1088/0004-637X/804/2/146.
  8. Lipski, Ł.; Stȩpień, K. . Monthly Notices of the Royal Astronomical Society. March 2008, 385 (1): 481–492. Bibcode:2008MNRAS.385..481L. arXiv:0712.3664. doi:10.1111/j.1365-2966.2008.12856.x.
  9. Fitzpatrick, E. L.; Massa, D., , The Astronomical Journal, March 2005, 129 (3): 1642–1662, Bibcode:2005AJ....129.1642F, arXiv:astro-ph/0412542, doi:10.1086/427855
  10. Bernacca, P. L.; Perinotto, M. . Contributi Osservatorio Astronomico di Padova in Asiago. 1970, 239 (1). Bibcode:1970CoAsi.239....1B.
  11. . SIMBAD. Centre de Données astronomiques de Strasbourg. [2010-06-23]. (原始内容存档于2016-03-04).
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