房宿二
房宿二(天蝎座ρ)是位于天蝎座的双星系统，其视星等为3.87。
  | |
| 觀測資料 曆元 J2000 | |
|---|---|
| 星座 | 天蝎座 |
| 星官 | |
| 赤經 | 15h 56m 53.07624s[1] |
| 赤緯 | -29° 12′ 50.6612″ [1] |
| 視星等（V） | 3.86[2] |
| 特性 | |
| 光谱分类 | B2 IV[3] |
| U−B 色指数 | -0.82[2] |
| B−V 色指数 | -0.20[2] |
| 天体测定 | |
| 徑向速度 (Rv) | −0.40[4] km/s |
| 自行 (μ) | 赤经：−15.68[1] mas/yr 赤纬：−24.88[1] mas/yr |
| 视差 (π) | 6.91 ± 0.19[1] mas |
| 距离 | 470 ± 10 ly (145 ± 4 pc) |
| 绝对星等 (MV) | −1.93[5] |
| 軌道[6] | |
| 繞行週期 (P) | 4.0033 d |
| 偏心率 (e) | 0.27 |
| 近心点 曆元 (T) | 2442178.6060 JD |
| 近心點幅角 (ω) (secondary) | 231° |
| 半振幅 (K1) (primary) | 16.40 km/s |
| 詳細資料 | |
| 質量 | 7.94±0.55[3] M☉ |
| 半徑 | 5.0[7] R☉ |
| 亮度 (bolometric) | 3,432[3] L☉ |
| 溫度 | 21,150[3] K |
| 自轉速度 (v sin i) | 113[8] km/s |
| 其他命名 | |
| 參考資料庫 | |
| SIMBAD | 资料 |
参考文献
- ^ 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 Ducati, J. R., VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system, CDS/ADC Collection of Electronic Catalogues, 2002, 2237, Bibcode:2002yCat.2237....0D.
- ^ 3.0 3.1 3.2 3.3 Hohle, M. M.; et al, Masses and luminosities of O- and B-type stars and red supergiants, Astronomische Nachrichten, April 2010, 331 (4): 349, Bibcode:2010AN....331..349H, arXiv:1003.2335 , doi:10.1002/asna.200911355.
- ^ Evans, D. S., The Revision of the General Catalogue of Radial Velocities, Batten, Alan Henry; Heard, John Frederick (编), Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30, University of Toronto: International Astronomical Union, June 20–24, 1966, Bibcode:1967IAUS...30...57E.
- ^ 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.
- ^ Pourbaix, D.; et al, SB9: The ninth catalogue of spectroscopic binary orbits, Astronomy and Astrophysics, September 2004, 424: 727–732, Bibcode:2004A&A...424..727P, arXiv:astro-ph/0406573 , doi:10.1051/0004-6361:20041213.
- ^ Pasinetti Fracassini, L. E.; et al, Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics, Astronomy and Astrophysics, February 2001, 367 (2): 521–524, Bibcode:2001A&A...367..521P, arXiv:astro-ph/0012289 , doi:10.1051/0004-6361:20000451.
- ^ Simón-Díaz, S.; Herrero, A., The IACOB project: I. Rotational velocities in northern Galactic O- and early B-type stars revisited. The impact of other sources of line-broadening, Astronomy & Astrophysics, 2014, 562: A135, Bibcode:2014A&A...562A.135S, arXiv:1311.3360 , doi:10.1051/0004-6361/201322758.
- ^ rho Sco -- Spectroscopic binary, SIMBAD Astronomical Database (Centre de Données astronomiques de Strasbourg), [2016-09-22].
外部链接
- Kaler, James B., Rho Scorpii, Stars (University of Illinois), June 20, 2008 [2016-09-23], （原始内容存档于2013-01-08）.