天市左垣十
天市左垣十(巨蛇座ξ)也称南海，又名BD-15 4621，HD 159876、SAO 160700、HR 6561，是巨蛇座的三合星系统[10]，视星等为3.54，其B1900.0坐标为赤經17h 37m 35.19983s，赤緯-15° 23′ 54.7940″。
| 觀測資料 曆元 J2000.0 | |
|---|---|
| 星座 | 巨蛇座 |
| 星官 | |
| 赤經 | 17h 37m 35.19983s[1] |
| 赤緯 | -15° 23′ 54.7940″[1] |
| 視星等（V） | 3.54[2] |
| 特性 | |
| 光谱分类 | A9 IIIp Sr[3] |
| U−B 色指数 | +0.12[2] |
| B−V 色指数 | +0.27[2] |
| 天体测定 | |
| 徑向速度 (Rv) | −42.8±0.7[4] km/s |
| 自行 (μ) | 赤经：−42.10[1] mas/yr 赤纬：−59.94[1] mas/yr |
| 视差 (π) | 30.98 ± 0.19[1] mas |
| 距离 | 105.3 ± 0.6 ly (32.3 ± 0.2 pc) |
| 绝对星等 (MV) | +1.00[5] |
| 軌道[6] | |
| 绕行周期 (P) | 2.2923 d |
| 偏心率 (e) | 0.00 |
| 近心点 历元 (T) | 2419210.191 JD |
| 半振幅 (K1) (primary) | 19.4 km/s |
| 詳細資料 | |
| ξ Ser Aa | |
| 質量 | 2.06[7] M☉ |
| 表面重力 (log g) | 3.55[3] |
| 亮度 | 30.6[8] L☉ |
| 溫度 | 7,217±41[7] K |
| 金属量 [Fe/H] | +0.07[3] dex |
| 自轉速度 (v sin i) | 54[9] km/s |
| 年齡 | 1.03[7] Gyr |
| ξ Ser Ab | |
| 質量 | 0.18[10] M☉ |
| 其他命名 | |
| 參考資料庫 | |
| SIMBAD | data |
参考文献
- van Leeuwen, F., , Astronomy and Astrophysics, 2007, 474 (2): 653–664, Bibcode:2007A&A...474..653V, arXiv:0708.1752, doi:10.1051/0004-6361:20078357.
- Mermilliod, J.-C., , Catalogue of Eggen's UBV data (SIMBAD), 1986, Bibcode:1986EgUBV........0M.
- Gray, R. O.; 等, , 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., , 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., , Astronomy Letters, 2012, 38 (5): 331, Bibcode:2012AstL...38..331A, arXiv:1108.4971, doi:10.1134/S1063773712050015.
- Pourbaix, D.; 等, , Astronomy and Astrophysics, 2004, 424 (2): 727, Bibcode:2004A&A...424..727P, arXiv:astro-ph/0406573, doi:10.1051/0004-6361:20041213.
- Luck, R. Earle, , The Astronomical Journal, 2015, 150 (3): 88, Bibcode:2015AJ....150...88L, arXiv:1507.01466, doi:10.1088/0004-6256/150/3/88.
- McDonald, I.; 等, , Monthly Notices of the Royal Astronomical Society, 2012, 427 (1): 343–57, Bibcode:2012MNRAS.427..343M, arXiv:1208.2037, doi:10.1111/j.1365-2966.2012.21873.x.
- Royer, F.; 等, , Astronomy and Astrophysics, October 2002, 393: 897−911, Bibcode:2002A&A...393..897R, arXiv:astro-ph/0205255, doi:10.1051/0004-6361:20020943.
- Tokovinin, A.; 等, , Astronomy and Astrophysics, May 2006, 450 (2): 681–69, Bibcode:2006A&A...450..681T, arXiv:astro-ph/0601518, doi:10.1051/0004-6361:20054427.
- , SIMBAD Astronomical Database (Centre de Données astronomiques de Strasbourg), [2017-03-23].
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