从官二
| 观测资料 历元 J2000.0 | |
|---|---|
| 星座 | 豺狼座 |
| 星官 | 从官 （房宿） |
| 赤经 | 15h 50m 57.5376s[1] |
| 赤纬 | −33° 37′ 37.796″[1] |
| 视星等（V） | 3.957[1] |
| 特性 | |
| 光谱分类 | B9.5V / A2Vm[2] |
| U−B 色指数 | −0.13[3] |
| B−V 色指数 | −0.04[3] |
| R−I 色指数 | −0.07[3] |
| 天体测定 | |
| 径向速度 (Rv) | 5 ± 20[1] km/s |
| 自行 (μ) | 赤经：−5.92[1] mas/yr 赤纬：−24.91[1] mas/yr |
| 视差 (π) | 15.86 ± 0.84[1] mas |
| 距离 | 210 ± 10 ly (63 ± 3 pc) |
| 详细资料 | |
| 半径 | 3.70[4] R☉ |
| 自转速度 (v sin i) | 0[3] km/s |
| 其他命名 | |
| 参考数据库 | |
| SIMBAD | 资料 |
从官二 （豺狼座χ ，χ Lup）是在豺狼座的一颗光谱联星[1]，他得视星等大约是3.957[1]。联星中的主星是一颗光谱类型为B9.5V的汞-锰星，伴星是光谱类型为A2Vm的金属线星[2]。
参考资料
[编辑]- ^ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 HD 141556 -- Spectroscopic binary, database entry, SIMBAD. Accessed on line August 14, 2008.
- ^ 2.0 2.1 On the Ga II and Ga III Resonance Lines and the Implication for Chemical Stratification in HgMn Stars, K. E. Nielsen et al., Astronomical Journal 130, #5 (November 2005), pp. 2312–2317, Bibcode：2005AJ....130.2312N, doi:10.1086/491703.
- ^ 3.0 3.1 3.2 3.3 HR 5883, database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID V/50. Accessed on line August 14, 2008.
- ^ HD 141556, database entry, Catalog of Apparent Diameters and Absolute Radii of Stars (CADARS), 3rd edition, L. E. Pasinetti-Fracassini, L. Pastori, S. Covino, and A. Pozzi, CDS ID II/224. Accessed on line August 14, 2008.
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