天市左垣十
天市左垣十(巨蛇座ξ)也稱南海，又名BD-15 4621，HD 159876、SAO 160700、HR 6561，是巨蛇座的三合星系統[10]，視星等為3.54，其B1900.0坐標為赤經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 | |
| 光譜分類 | A9 IIIp Sr[3] |
| U−B 色指數 | +0.12[2] |
| B−V 色指數 | +0.27[2] |
| 天體測定 | |
| 徑向速度 (Rv) | −42.8±0.7[4] km/s |
| 自行 (μ) | 赤經：−42.10[1] mas/yr 赤緯：−59.94[1] mas/yr |
| 視差 (π) | 30.98 ± 0.19[1] mas |
| 距離 | 105.3 ± 0.6 ly (32.3 ± 0.2 pc) |
| 絕對星等 (MV) | +1.00[5] |
| 軌道[6] | |
| 繞行週期 (P) | 2.2923 d |
| 偏心率 (e) | 0.00 |
| 近心點 曆元 (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 |
| 金屬量 [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 | 資料 |
參考文獻
- ^ 1.0 1.1 1.2 1.3 1.4 van Leeuwen, F., Validation of the new Hipparcos reduction, Astronomy and Astrophysics, 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- ^ 2.0 2.1 2.2 Mermilliod, J.-C., Compilation of Eggen's UBV data, transformed to UBV (unpublished), Catalogue of Eggen's UBV data (SIMBAD), 1986, Bibcode:1986EgUBV........0M.
- ^ 3.0 3.1 3.2 Gray, R. O.; et al, Contributions to the Nearby Stars (NStars) Project: spectroscopy of stars earlier than M0 within 40 pc-The Southern Sample, 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., Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project, 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., 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, 2004, 424 (2): 727, Bibcode:2004A&A...424..727P, arXiv:astro-ph/0406573 , doi:10.1051/0004-6361:20041213.
- ^ 7.0 7.1 7.2 Luck, R. Earle, Abundances in the Local Region. I. G and K Giants, The Astronomical Journal, 2015, 150 (3): 88, Bibcode:2015AJ....150...88L, arXiv:1507.01466 , doi:10.1088/0004-6256/150/3/88.
- ^ McDonald, I.; et al, Fundamental Parameters and Infrared Excesses of Hipparcos Stars, 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.; et al, Rotational velocities of A-type stars in the northern hemisphere. II. Measurement of v sin i, Astronomy and Astrophysics, October 2002, 393: 897−911, Bibcode:2002A&A...393..897R, arXiv:astro-ph/0205255 , doi:10.1051/0004-6361:20020943.
- ^ 10.0 10.1 Tokovinin, A.; et al, Tertiary companions to close spectroscopic binaries, Astronomy and Astrophysics, May 2006, 450 (2): 681–69, Bibcode:2006A&A...450..681T, arXiv:astro-ph/0601518 , doi:10.1051/0004-6361:20054427.
- ^ ksi Ser -- Spectroscopic binary, SIMBAD Astronomical Database (Centre de Données astronomiques de Strasbourg), [2017-03-23], （原始內容存檔於2019-08-09）.
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