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西上將

維基百科,自由的百科全書
西上將
觀測資料
曆元 J2000
星座 獅子座
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
光譜分類B9.5 Vs[3]
U−B 色指數–0.12[4]
B−V 色指數–0.06[4]
天體測定
徑向速度 (Rv)–5.3[5] km/s
自行 (μ) 赤經:–91.76[1] mas/yr
赤緯:–12.83[1] mas/yr
視差 (π)15.24 ± 0.81[1] mas
距離210 ± 10 ly
(66 ± 3 pc)
絕對星等 (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
金屬量 [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 Leo、​77 Leo、​BD−06° 2437、​FK5 427、​HD 98664、​HIP 55434、​HR 4386、​SAO 118804[11]
參考資料庫
SIMBAD資料

西上將σ Leo / 獅子座σ)也稱太微右垣二,是獅子座的一顆藍白恆星,在中國古代星官中屬於太微垣太微右垣。它視星等為+4.05,是獅子座的第四亮星,光譜型B9.5V。

參考文獻

[編輯]
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  4. ^ 4.0 4.1 Johnson, H. L.; Iriarte, B.; Mitchell, R. I.; Wisniewskj, W. Z. UBVRIJKL photometry of the bright stars. Communications of the Lunar and Planetary Laboratory. 1966, 4 (99). Bibcode:1966CoLPL...4...99J. 
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  7. ^ 7.0 7.1 David, Trevor J.; Hillenbrand, Lynne A., The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets, The Astrophysical Journal, 2015, 804 (2): 146, Bibcode:2015ApJ...804..146D, arXiv:1501.03154可免費查閱, doi:10.1088/0004-637X/804/2/146. 
  8. ^ 8.0 8.1 8.2 Lipski, Ł.; Stȩpień, K. Effective temperatures of magnetic chemically peculiar stars from full spectral energy distributions. Monthly Notices of the Royal Astronomical Society. March 2008, 385 (1): 481–492. Bibcode:2008MNRAS.385..481L. arXiv:0712.3664可免費查閱. doi:10.1111/j.1365-2966.2008.12856.x. 
  9. ^ Fitzpatrick, E. L.; Massa, D., Determining the Physical Properties of the B Stars. II. Calibration of Synthetic Photometry, The Astronomical Journal, March 2005, 129 (3): 1642–1662, Bibcode:2005AJ....129.1642F, arXiv:astro-ph/0412542可免費查閱, doi:10.1086/427855 
  10. ^ Bernacca, P. L.; Perinotto, M. A catalogue of stellar rotational velocities. Contributi Osservatorio Astronomico di Padova in Asiago. 1970, 239 (1). Bibcode:1970CoAsi.239....1B. 
  11. ^ sig Leo -- Star. SIMBAD. Centre de Données astronomiques de Strasbourg. [2010-06-23]. (原始內容存檔於2016-03-04).