羽林军三
| 观测资料 历元 J2000 | |
|---|---|
| 星座 | 宝瓶座 |
| 星官 | 羽林军（室宿） |
| 赤经 | 22h 14m 18.03271s[1] |
| 赤纬 | –21° 04′ 28.4330″[1] |
| 视星等（V） | 5.354[2] |
| 特性 | |
| 光谱分类 | K0 III + F8 V[3] |
| U−B 色指数 | +0.465[2] |
| B−V 色指数 | +0.834[2] |
| 天体测定 | |
| 径向速度 (Rv) | –23.7[4] km/s |
| 自行 (μ) | 赤经：+24.30[1] mas/yr 赤纬：+56.07[1] mas/yr |
| 视差 (π) | 13.97 ± 0.73[1] mas |
| 距离 | 230 ± 10 ly (72 ± 4 pc) |
| 详细资料 | |
| 表面重力 (log g) | 2.85[5] |
| 温度 | 4,750[5] K |
| 金属量 [Fe/H] | –0.13[5] dex |
| 其他命名 | |
| 参考数据库 | |
| SIMBAD | 资料 |
羽林军三（宝瓶座41，41 Aquarii，缩写为41 Aqr）是在天球赤道上的星座，宝瓶座内的双星[3]，英译名称宝瓶座41是依据佛氏命名法而来的。它的视星等为5.354等[2]，与地球的距离大约是230光年（71秒差距）。 较亮的一颗是红群聚[7]的巨星，光谱类型为K0III，星等为5.73。在角距离5.148角秒处，较暗的一颗是F型主序星，星等为7.16等，光谱类型为F8V[3]。
参考资料
[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 2.3 Rakos, K. D.; et al, Photometric and astrometric observations of close visual binaries, Astronomy and Astrophysics Supplement Series, February 1982, 47: 221–235, Bibcode:1982A&AS...47..221R.
- ^ 3.0 3.1 3.2 Eggleton, P. P.; Tokovinin, A. A., A catalogue of multiplicity among bright stellar systems, Monthly Notices of the Royal Astronomical Society, September 2008, 389 (2): 869–879, Bibcode:2008MNRAS.389..869E, arXiv:0806.2878 , doi:10.1111/j.1365-2966.2008.13596.x.
- ^ Wilson, Ralph Elmer, General Catalogue of Stellar Radial Velocities, Washington: Carnegie Institution of Washington, 1953, Bibcode:1953GCRV..C......0W.
- ^ 5.0 5.1 5.2 McWilliam, Andrew, High-resolution spectroscopic survey of 671 GK giants, Astrophysical Journal Supplement Series, December 1990, 74: 1075–1128, Bibcode:1990ApJS...74.1075M, doi:10.1086/191527.
- ^ 41 Aqr -- Star in double system, SIMBAD Astronomical Database (Centre de Données astronomiques de Strasbourg), [2012-02-23], （原始内容存档于2020-09-15）.
- ^ Alves, David R., K-Band Calibration of the Red Clump Luminosity, The Astrophysical Journal, August 2000, 539 (2): 732–741, Bibcode:2000ApJ...539..732A, arXiv:astro-ph/0003329 , doi:10.1086/309278.
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