维基百科
女宿一
女宿一（宝瓶座ε；Albali；HD 198001）是位于宝瓶座的恒星，其视星等为3.77。
| 觀測資料 曆元 J2000 | |
|---|---|
| 星座 | 宝瓶座 |
| 星官 | |
| 赤經 | 20h 47m 40.55260s[1] |
| 赤緯 | −09° 29′ 44.7877″[1] |
| 視星等（V） | 3.77[2] |
| 特性 | |
| 光谱分类 | A1 V[2] |
| U−B 色指数 | +0.029[3] |
| B−V 色指数 | –0.001[3] |
| 变星类型 | Suspected[4] |
| 天体测定 | |
| 徑向速度 (Rv) | –16[5] km/s |
| 自行 (μ) | 赤经：+33.98[1] mas/yr 赤纬：-34.77[1] mas/yr |
| 视差 (π) | 15.70 ± 0.21[1] mas |
| 距离 | 208 ± 3 ly (63.7 ± 0.9 pc) |
| 绝对星等 (MV) | −0.46[6] |
| 詳細資料 | |
| 表面重力 (log g) | 3.64[7] |
| 溫度 | 9,470[7] K |
| 金属量 [Fe/H] | +0.07[7] dex |
| 自轉速度 (v sin i) | 70[2] km/s |
| 年齡 | 240[8] Myr |
| 其他命名 | |
| 參考資料庫 | |
| SIMBAD | 资料 |
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, November 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 Levato, O. H., Rotational Velocities and Spectral Types of Some A-Type Stars, Publications of the Astronomical Society of the Pacific, August 1972, 84 (500): 584, Bibcode:1972PASP...84..584L, doi:10.1086/129336.
- ^ 3.0 3.1 Cousins, A. W. J., Standardization of Broadband Photometry of Equatorial Standards, South African Astronomical Observatory Circulars, 1984, 8: 59, Bibcode:1984SAAOC...8...59C.
- ^ 4.0 4.1 * eps Aqr. SIMBAD. 斯特拉斯堡天文資料中心. [2012-06-29].
- ^ Wielen, R.; et al, Sixth Catalogue of Fundamental Stars (FK6). Part I. Basic fundamental stars with direct solutions (35), Astronomisches Rechen-Institut Heidelberg, 1999, Bibcode:1999VeARI..35....1W.
- ^ Ammler-von Eiff, M.; Reiners, A., New measurements of rotation and differential rotation in A-F stars: are there two populations of differentially rotating stars?, Astronomy & Astrophysics, June 2012, 542: A116, Bibcode:2012A&A...542A.116A, arXiv:1204.2459 , doi:10.1051/0004-6361/201118724.
- ^ 7.0 7.1 7.2 Hill, G. M., Compositional differences among the A-type stars. 2: Spectrum synthesis up to V sin i = 110 km/s, Astronomy and Astrophysics, February 1995, 294 (2): 536–546, Bibcode:1995A&A...294..536H.
- ^ Su, K. Y. L.; et al, Debris Disk Evolution around A Stars, The Astrophysical Journal, December 2006, 653 (1): 675–689, Bibcode:2006ApJ...653..675S, arXiv:astro-ph/0608563 , doi:10.1086/508649.
外部链接 编辑
- Image Epsilon Aquarii（页面存档备份，存于互联网档案馆）