夾白二
觀測資料 曆元 J2000.0 | |
---|---|
星座 | 網罟座 |
星官 | 夾白(近南極星區) |
赤經 | 04h 14m 25.48414s[1] |
赤緯 | −62° 28′ 25.8917″[1] |
視星等(V) | 3.315[2] |
特性 | |
光譜分類 | G8 II-III[3] |
U−B 色指數 | +0.63[4] |
B−V 色指數 | +0.922[2] |
R−I 色指數 | +0.659[2] |
天體測定 | |
徑向速度 (Rv) | +35.5[5] km/s |
自行 (μ) | 赤經:+41.97[1] mas/yr 赤緯:+49.42[1] mas/yr |
視差 (π) | 20.18 ± 0.10[1] mas |
距離 | 161.6 ± 0.8 ly (49.6 ± 0.2 pc) |
絕對星等 (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 |
金屬量 [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 | 資料 |
夾白二 (網罟座α)是南天星座網罟座的一顆恆星[7],其視星等為3.3[2] 。
命名
在中國, 它屬於近南極星區的星官夾白 (Jiá Bái), 意思是夾着白色的雲,白色的雲指的是麥哲倫雲,它包含兩顆恆星,分別是夾白一(劍魚座θ)和夾白二(網罟座α)。[11]
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, November 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 Gutierrez-Moreno, Adelina; et al, A System of photometric standards 1, Publicaciones Universidad de Chile, Department de Astronomy: 1–17, 1966, Bibcode:1966PDAUC...1....1G
- ^ Houk, Nancy, Michigan catalogue of two-dimensional spectral types for the HD stars 1, Ann Arbor: Dept. of Astronomy, University of Michigan, 1978, Bibcode:1975mcts.book.....H
- ^ HR 1336 (頁面存檔備份,存於網際網路檔案館), database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID V/50 (頁面存檔備份,存於網際網路檔案館). Accessed on line September 4, 2008.
- ^ Evans, D. S., Batten, Alan Henry; Heard, John Frederick , 編, The Revision of the General Catalogue of Radial Velocities, University of Toronto: International Astronomical Union, June 20–24, 1966 [2009-09-10], (原始內容存檔於2019-06-26)
|booktitle=
被忽略 (幫助) - ^ 6.0 6.1 6.2 6.3 6.4 6.5 6.6 da Silva, L.; et al, Basic physical parameters of a selected sample of evolved stars, Astronomy and Astrophysics, November 2006, 458 (2): 609–623, Bibcode:2006A&A...458..609D, arXiv:astro-ph/0608160
, doi:10.1051/0004-6361:20065105
- ^ 7.0 7.1 Alpha Ret (頁面存檔備份,存於網際網路檔案館), Jim Kaler, Stars. Accessed on line September 4, 2008.
- ^ Schröder, C.; Reiners, A.; Schmitt, J. H. M. M., Ca II HK emission in rapidly rotating stars. Evidence for an onset of the solar-type dynamo, 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 (頁面存檔備份,存於網際網路檔案館), 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 (頁面存檔備份,存於網際網路檔案館)
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