LP 658-2
| 观测资料 历元 J2000.0 | |
|---|---|
| 星座 | 猎户座 |
| 星官 | |
| 赤经 | 05h 55m 09.53s[1] |
| 赤纬 | −04° 10′ 07.1″[1] |
| 视星等（V） | 14.488[2] |
| 特性 | |
| 光谱分类 | DZ11.8[2] |
| 视星等 (B) | 15.49[1] |
| 视星等 (V) | 14.488[2] |
| 视星等 (RKC) | 13.99[3] |
| 视星等 (IKC) | 13.51[3] |
| 视星等 (J) | 13.05 ± 0.03[3] |
| 视星等 (H) | 12.86 ± 0.03[3] |
| 视星等 (KS) | 12.78 ± 0.03[3] |
| B−V 色指数 | 1.0[1][2] |
| 天体测定 | |
| 自行 (μ) | 赤经：535.249±0.017[4] mas/yr 赤纬：−2317.011±0.015[4] mas/yr |
| 视差 (π) | 155.2373 ± 0.0175[4] mas |
| 距离 | 21.010 ± 0.002 ly (6.4418 ± 0.0007 pc) |
| 绝对星等 (MV) | 15.44 ± 0.03[3] |
| 详细资料 [2] | |
| From Holberg etal. (2008) | |
| 质量 | 0.45±0.01 M☉ |
| 半径 | 0.014[2][note 1] R☉ |
| 表面重力 (log g) | 7.80±0.02[2] |
| 温度 | 4,270±70,[2] K |
| 年龄 | 6.42[5] Gyr |
| 其他命名 | |
| 参考数据库 | |
| SIMBAD | 资料 |
LP 658-2是一颗位于猎户座的白矮星。[1] 视星等大约14.488。[2]
距离
[编辑]根据2009年的一篇论文，它是距离太阳最近的第八颗已知白矮星（仅次于天狼星B、南河三B、范马南星、GJ 440、波江座40B、施泰因2051B和G 240-72）。[7]
物理参数
[编辑]颜色
[编辑]尽管它被归类为“白”矮星，但由于温度比太阳低，可与橙矮星相媲美，因此它看起来是黄白色而不是白色。
注释
[编辑]- ^ From surface gravity and mass.
参考
[编辑]- ^ 1.0 1.1 1.2 1.3 1.4 1.5 [ GJ 223.2] 请检查
|url=值 (帮助). SIMBAD. 斯特拉斯堡天文资料中心. - ^ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 Holberg, J. B.; Sion, E. M.; Oswalt, T.; McCook, G. P.; Foran, S.; Subasavage, John P. A new look at the local white dwarf population. The Astronomical Journal. 1 April 2008, 135 (4): 1225–1238. Bibcode:2008AJ....135.1225H. doi:10.1088/0004-6256/135/4/1225
.
- ^ 3.0 3.1 3.2 3.3 3.4 3.5 Subasavage, John P.; Jao, Wei-Chun; Henry, Todd J.; Bergeron, P.; Dufour, P.; Ianna, Philip A.; Costa, Edgardo; Méndez, René A. The solar neighborhood. XXI. Parallax results from the CTIOPI 0.9 m program: 20 new members of the 25 parsec white dwarf sample. The Astronomical Journal. 1 June 2009, 137 (6): 4547–4560. Bibcode:2009AJ....137.4547S. S2CID 14696597. arXiv:0902.0627 . doi:10.1088/0004-6256/137/6/4547.
- ^ 4.0 4.1 4.2 Brown, A. G. A.; et al. Gaia Early Data Release 3: Summary of the contents and survey properties. Astronomy & Astrophysics. 2021, 649: A1. Bibcode:2021A&A...649A...1G. S2CID 227254300. arXiv:2012.01533 . doi:10.1051/0004-6361/202039657 . 已忽略未知参数
|collaboration=(帮助) (勘误: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR. - ^ Sion, Edward M.; Holberg, J. B.; Oswalt, Terry D.; McCook, George P.; Wasatonic, Richard. The white dwarfs within 20 parsecs of the Sun: kinematics and statistics. The Astronomical Journal. 1 December 2009, 138 (6): 1681–1689. Bibcode:2009AJ....138.1681S. S2CID 119284418. arXiv:0910.1288 . doi:10.1088/0004-6256/138/6/1681.
- ^ van Altena, W. F.; Lee, J. T.; Hoffleit, E. D. The General Catalogue of Trigonometric [Stellar] Parallaxes 4th. New Haven, CT: Yale University Observatory. 1995. Bibcode:1995gcts.book.....V. VizieR entry （页面存档备份，存于互联网档案馆）.
- ^ Table 1 in Sion et al. 2009
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