夹白二
夹白二 (网罟座α)是南天星座网罟座的一颗恒星[7],其视星等为3.3[2] 。
觀測資料 曆元 J2000.0 | |
---|---|
星座 | 网罟座 |
星官 | 夹白(近南极星区) |
赤經 | 04h 14m 25.48414s[1] |
赤緯 | −62° 28′ 25.8917″[1] |
視星等(V) | 3.315[2] |
特性 | |
光谱分类 | G8 II-III[3] |
U−B 色指数 | +0.63[4] |
B−V 色指数 | +0.922[2] |
R−I 色指数 | +0.659[2] |
天体测定 | |
徑向速度 (Rv) | +35.5[5] km/s |
自行 (μ) | 赤经:+41.97[1] mas/yr 赤纬:+49.42[1] mas/yr |
视差 (π) | 20.18 ± 0.10[1] mas |
距离 | 161.6 ± 0.8 ly (49.6 ± 0.2 pc) |
绝对星等 (MV) | −0.17 ± 0.05[6] |
詳細資料 | |
質量 | 3.11 ± 0.06[6] M☉ |
半徑 | 12.8 ± 0.6[6] R☉ |
表面重力 (log g) | 2.69 ± 0.04[6] |
亮度 | 240[7] L☉ |
溫度 | 5,196[6] K |
金属量 [Fe/H] | 0.07[6] dex |
自轉速度 (v sin i) | 5.7[8] km/s |
年齡 | 0.33 ± 0.02[6] Gyr |
其他命名 | |
參考資料庫 | |
SIMBAD | 资料 |
参考文献
- van Leeuwen, F., , Astronomy and Astrophysics, November 2007, 474 (2): 653–664, Bibcode:2007A&A...474..653V, arXiv:0708.1752 , doi:10.1051/0004-6361:20078357
- Gutierrez-Moreno, Adelina; et al, 1, Publicaciones Universidad de Chile, Department de Astronomy: 1–17, 1966, Bibcode:1966PDAUC...1....1G
- Houk, Nancy, 1, Ann Arbor: Dept. of Astronomy, University of Michigan, 1978, Bibcode:1975mcts.book.....H
- HR 1336 (页面存档备份,存于), database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID V/50 (页面存档备份,存于). Accessed on line September 4, 2008.
- Evans, D. S., Batten, Alan Henry; Heard, John Frederick , 编, , University of Toronto: International Astronomical Union, June 20–24, 1966 [2009-09-10], (原始内容存档于2019-06-26)
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被忽略 (帮助) - da Silva, L.; et al, , Astronomy and Astrophysics, November 2006, 458 (2): 609–623, Bibcode:2006A&A...458..609D, arXiv:astro-ph/0608160 , doi:10.1051/0004-6361:20065105
- Alpha Ret (页面存档备份,存于), Jim Kaler, Stars. Accessed on line September 4, 2008.
- Schröder, C.; Reiners, A.; Schmitt, J. H. M. M., , Astronomy and Astrophysics, January 2009, 493 (3): 1099–1107, Bibcode:2009A&A...493.1099S, doi:10.1051/0004-6361:200810377
- * alf Ret -- Star in double system, database entry, SIMBAD. Accessed on line September 4, 2008.
- Entry 04144-6228, The Washington Double Star Catalog (页面存档备份,存于), United States Naval Observatory. Accessed on line September 4, 2008.
- (中文) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 27 日 (页面存档备份,存于)
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