天市右垣八

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天市右垣八
觀測資料
曆元 J2000.0
星座 巨蛇座
星官
赤經 15h 50m 48.96622s[1]
赤緯 +04° 28′ 39.8311″[1]
視星等(V) +3.69[2]
特性
光谱分类 kA2hA5mA7 V[3]
U−B 色指数 +0.12[2]
B−V 色指数 +0.14[2]
天体测定
径向速度 (Rv) −9.4±0.6[4] km/s
自行 (μ) 赤经:+128.19[1] mas/yr
赤纬:+62.16[1] mas/yr
视差 (π) 46.30 ± 0.19[1] mas
距离 70.4 ± 0.3 ly
(21.6 ± 0.09 pc)
绝对星等 (MV) +2.04[5]
詳細資料
質量 1.820±0.026[6] M
半徑 1.783±0.040[6] R
表面重力 (log g) 4.346[7]
亮度 12.134±0.296[6] L
溫度 7,928±88[7] K
金属量 [Fe/H] +0.38[7] dex
自轉速度 (v sin i) 33.1[7] km/s
年齡 500±200[6] Myr
其他命名
ε Ser37 SerpentisHD 141795、HIP 77622、HR 5892、SAO 121218[8]
參考資料庫
SIMBAD data

天市右垣八巨蛇座ε),也称[9],是位于巨蛇座的恒星,其视星等为3.69。

参考文献[编辑]

  1. ^ 1.0 1.1 1.2 1.3 1.4 van Leeuwen, F., Validation of the new Hipparcos reduction, Astronomy and Astrophysics, 2007, 474 (2): 653–664, Bibcode:2007A&A...474..653V, arXiv:0708.1752, doi:10.1051/0004-6361:20078357. 
  2. ^ 2.0 2.1 2.2 Feinstein, A., Photoelectric UBVRI observations of Am stars, Astronomical Journal, 1974, 79: 1290, Bibcode:1974AJ.....79.1290F, doi:10.1086/111675. 
  3. ^ Gray, R. O.; 等, Contributions to the Nearby Stars (NStars) Project: spectroscopy of stars earlier than M0 within 40 pc-The Southern Sample, The Astronomical Journal, July 2006, 132 (1): 161–170, Bibcode:2006AJ....132..161G, arXiv:astro-ph/0603770, doi:10.1086/504637. 
  4. ^ de Bruijne, J. H. J.; Eilers, A.-C., Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project, Astronomy & Astrophysics, October 2012, 546: 14, Bibcode:2012A&A...546A..61D, arXiv:1208.3048, doi:10.1051/0004-6361/201219219, A61. 
  5. ^ Anderson, E.; Francis, Ch., XHIP: An extended hipparcos compilation, Astronomy Letters, 2012, 38 (5): 331, Bibcode:2012AstL...38..331A, arXiv:1108.4971, doi:10.1134/S1063773712050015. 
  6. ^ 6.0 6.1 6.2 6.3 Boyajian, Tabetha S.; 等, Stellar Diameters and Temperatures. I. Main-sequence A, F, and G Stars, The Astrophysical Journal, February 2012, 746 (1): 101, Bibcode:2012ApJ...746..101B, arXiv:1112.3316, doi:10.1088/0004-637X/746/1/101. . See Table 10.
  7. ^ 7.0 7.1 7.2 7.3 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, doi:10.1088/0004-637X/804/2/146. 
  8. ^ eps Ser. SIMBAD. 斯特拉斯堡天文資料中心. [2017-09-26]. 
  9. ^ Rodriguez, David R.; 等, Stellar multiplicity and debris discs: an unbiased sample, Monthly Notices of the Royal Astronomical Society, May 2015, 449 (3): 3160–3170, Bibcode:2015MNRAS.449.3160R, arXiv:1503.01320, doi:10.1093/mnras/stv483.