觜宿三
  | |
| 观测资料 历元 J2000.0 | |
|---|---|
| 星座 | 猎户座 |
| 星官 | 觜 （觜宿） |
| 赤经 | 05h 36m 54.38819s[1] |
| 赤纬 | +09° 17′ 26.4096″[1] |
| 视星等（V） | 4.081[2] |
| 特性 | |
| 光谱分类 | G8 III-IV[3] |
| U−B 色指数 | +0.618[2] |
| B−V 色指数 | +0.966[2] |
| 天体测定 | |
| 径向速度 (Rv) | +98.96±0.09[4] km/s |
| 自行 (μ) | 赤经：+97.24[1] mas/yr 赤纬：−305.57[1] mas/yr |
| 视差 (π) | 27.76 ± 0.27[1] mas |
| 距离 | 117 ± 1 ly (36.0 ± 0.4 pc) |
| 绝对星等 (MV) | +1.33±0.07[5] |
| 详细资料 [4] | |
| 质量 | 1.07±0.04 M☉ |
| 半径 | 7.72±0.27 R☉ |
| 表面重力 (log g) | 3.00±0.02 |
| 亮度 | 31.6 L☉ |
| 温度 | 4,856±11 K |
| 金属量 [Fe/H] | −0.56±0.02 dex |
| 自转速度 (v sin i) | 1.91±0.53 km/s |
| 年龄 | 6.91±1.04 Gyr |
| 其他命名 | |
| 参考资料库 | |
| SIMBAD | 资料 |
这是一颗G-型巨星或次巨星，所以它的光谱类型为G8III-IV[3]，年龄为69亿年，已经远离主序带。它的质量是1.07太阳质量，半径是7.72太阳半径。在4,856K的有效温度下，外层大气的光度是31.6倍太阳光度[4]。
参考资料
[编辑]- ^ 1.0 1.1 1.2 1.3 1.4 1.5 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 2.3 Cousins, A. W. J., Standardization of Broadband Photometry of Equatorial Standards, South African Astronomical Observatory Circulars, 1984, 8: 59, Bibcode:1984SAAOC...8...59C.
- ^ 3.0 3.1 Frasca, A.; et al, REM near-IR and optical photometric monitoring of pre-main sequence stars in Orion. Rotation periods and starspot parameters, Astronomy and Astrophysics, December 2009, 508 (3): 1313–1330, Bibcode:2009A&A...508.1313F, arXiv:0911.0760 , doi:10.1051/0004-6361/200913327.
- ^ 4.0 4.1 4.2 Jofré, E.; et al, Stellar parameters and chemical abundances of 223 evolved stars with and without planets, Astronomy & Astrophysics, 2015, 574: A50, Bibcode:2015A&A...574A..50J, arXiv:1410.6422 , doi:10.1051/0004-6361/201424474, A50.
- ^ Charbonnel, Corinne; et al, Mixing processes during the evolution of red giants with moderate metal deficiencies: the role of molecular-weight barriers, Astronomy and Astrophysics, April 1998, 332: 204–214, Bibcode:1998A&A...332..204C, arXiv:astro-ph/9712207 .
- ^ phi02 Ori. SIMBAD. 斯特拉斯堡天文资料中心. [2016-11-30].
- ^ Kaler, James B., Phi-1 Orionis, Stars (University of Illinois), February 10, 2012 [2016-11-30], （原始内容存档于2020-10-02）.
