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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]

夹白二
Diagram showing star positions and boundaries of the Reticulum constellation and its surroundings
Cercle rouge 100%.svg

夹白二的位置 (红圈处)
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
α Ret, Alpha Reticuli, Alpha Ret, CCDM J04144-6228, CPD−62 332, FK5 156, GC 5164, HD 27256, HIP 19780, HR 1336, IDS 04131-6243, PPM 353975, SAO 248969, WDS 04144-6228A.[9][10]
參考資料庫
SIMBAD data

命名编辑

中国, 它属于近南极星区的星官夾白 (Jiá Bái), 意思是夹着白色的云,白色的云指的是麦哲伦云,它包含两颗恒星,分别是夹白一(剑鱼座θ)和夹白二(网罟座α)。[11]


参考文献编辑

  1. ^ 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. ^ 2.0 2.1 2.2 2.3 Gutierrez-Moreno, Adelina; 等, A System of photometric standards 1, Publicaciones Universidad de Chile, Department de Astronomy: 1–17, 1966, Bibcode:1966PDAUC...1....1G 
  3. ^ 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 
  4. ^ HR 1336, database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID V/50. Accessed on line September 4, 2008.
  5. ^ Evans, D. S., Batten, Alan Henry; Heard, John Frederick, 编, The Revision of the General Catalogue of Radial Velocities, University of Toronto: International Astronomical Union, June 20–24, 1966 [2009-09-10] 
  6. ^ 6.0 6.1 6.2 6.3 6.4 6.5 6.6 da Silva, L.; 等, 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. ^ 7.0 7.1 Alpha Ret 互联网档案馆存檔,存档日期2008-12-04., Jim Kaler, Stars. Accessed on line September 4, 2008.
  8. ^ 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 
  9. ^ * alf Ret -- Star in double system, database entry, SIMBAD. Accessed on line September 4, 2008.
  10. ^ Entry 04144-6228, The Washington Double Star Catalog 互联网档案馆存檔,存档日期2008-04-12., United States Naval Observatory. Accessed on line September 4, 2008.
  11. ^ (中文) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 27 日