天市右垣四
天市右垣四（巨蛇座γ）也稱鄭，是位於巨蛇座的恆星，其視星等為3.85[2]。
| 觀測資料 曆元 J2000 | |
|---|---|
| 星座 | 巨蛇座 |
| 星官 | |
| 赤經 | 15h 56m 27.18269s[1] |
| 赤緯 | +15° 39′ 41.8206″[1] |
| 視星等（V） | 3.85[2] |
| 特性 | |
| 光譜分類 | F6 V[2] |
| U−B 色指數 | -0.03[3] |
| B−V 色指數 | +0.48[2] |
| 天體測定 | |
| 徑向速度 (Rv) | 6.78 ± 0.09[4] km/s |
| 自行 (μ) | 赤經：310.93 ± 0.20[1] mas/yr 赤緯：-1282.19 ± 0.18[1] mas/yr |
| 視差 (π) | 89.565 ± 0.18[1] mas |
| 距離 | 36.42 ± 0.07 ly (11.17 ± 0.02 pc) |
| 絕對星等 (MV) | 3.60[5] |
| 詳細資料 | |
| 質量 | 1.30 ± 0.15[6] M☉ |
| 半徑 | 1.55 ± 0.05[6] R☉ |
| 表面重力 (log g) | 4.23[2] |
| 亮度 | 3.02 ± 0.09[6] L☉ |
| 溫度 | 6,350 ± 310[2] K |
| 金屬量 [Fe/H] | −0.19[6] dex |
| 自轉速度 (v sin i) | 10.2[6] km/s |
| 年齡 | 3.49[7] Gyr |
| 其他命名 | |
| 參考資料庫 | |
| SIMBAD | 資料 |
參考文獻
編輯- ^ 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 [2018-02-26]. Bibcode:2007A&A...474..653V. arXiv:0708.1752
. doi:10.1051/0004-6361:20078357. （原始內容存檔於2016-04-02）. Vizier catalog entry （頁面存檔備份，存於互聯網檔案館）
- ^ 2.0 2.1 2.2 2.3 2.4 2.5 Malagnini, M. L.; Morossi, C., Accurate absolute luminosities, effective temperatures, radii, masses and surface gravities for a selected sample of field stars, Astronomy and Astrophysics Supplement Series, November 1990, 85 (3): 1015–1019, Bibcode:1990A&AS...85.1015M
- ^ Mermilliod, J.-C., Compilation of Eggen's UBV data, transformed to UBV (unpublished), Catalogue of Eggen's UBV data. SIMBAD, 1986, Bibcode:1986EgUBV........0M.
- ^ Nidever, David L.; et al, Radial Velocities for 889 Late-Type Stars, The Astrophysical Journal Supplement Series, August 2002, 141 (2): 503–522, Bibcode:2002ApJS..141..503N, arXiv:astro-ph/0112477 , doi:10.1086/340570.
- ^ Holmberg, J.; et al, The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics, Astronomy and Astrophysics, July 2009, 501 (3): 941–947, Bibcode:2009A&A...501..941H, arXiv:0811.3982 , doi:10.1051/0004-6361/200811191.
- ^ 6.0 6.1 6.2 6.3 6.4 Bruntt, H.; et al, Accurate fundamental parameters for 23 bright solar-type stars, Monthly Notices of the Royal Astronomical Society, July 2010, 405 (3): 1907–1923, Bibcode:2010MNRAS.405.1907B, arXiv:1002.4268 , doi:10.1111/j.1365-2966.2010.16575.x
- ^ Vican, Laura, Age Determination for 346 Nearby Stars in the Herschel DEBRIS Survey, The Astronomical Journal, June 2012, 143 (6): 135, Bibcode:2012AJ....143..135V, arXiv:1203.1966 , doi:10.1088/0004-6256/143/6/135.
- ^ * gam Ser. SIMBAD. 斯特拉斯堡天文資料中心. [2007-01-23].
外部連結
編輯- Gamma Serpentis by Professor Jim Kaler.