天市右垣八
外观
此條目需要擴充。 (2018年2月23日) |
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 | |
徑向速度 (Rv) | ±0.6 −9.4[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 (21.60 ± 0.09 pc) |
绝对星等 (MV) | +2.04[5] |
詳細資料 | |
質量 | ±0.026 1.820[6] M☉ |
半徑 | ±0.040 1.783[6] R☉ |
表面重力 (log g) | 4.346[7] |
亮度 | ±0.296 12.134[6] L☉ |
溫度 | ±88 7,928[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 | ±200 500[6] Myr |
其他命名 | |
參考資料庫 | |
SIMBAD | 资料 |
天市右垣八(巨蛇座ε),也称巴[9],是位于巨蛇座的恒星,其视星等为3.69。
参考文献
[编辑]- ^ 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.
- ^ 2.0 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.
- ^ Gray, R. O.; et al, 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.
- ^ 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.
- ^ 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.
- ^ 6.0 6.1 6.2 6.3 Boyajian, Tabetha S.; et al, 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.
- ^ 7.0 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.
- ^ eps Ser. SIMBAD. 斯特拉斯堡天文資料中心. [2017-09-26].
- ^ Rodriguez, David R.; et al, 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.