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水位一

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水位一
观测资料
历元 J2000.0 (ICRS)
星座 小犬座
星官 水位井宿
赤经 07h 29m 47.78172s[1]
赤纬 +12° 00′ 23.6347″[1]
视星等(V) +4.55[2]
特性
演化阶段巨星
光谱分类K1 III[3]
B−V 色指数1.276±0.001[2]
天体测定
径向速度 (Rv)−16.31±0.13[4] km/s
自行 (μ) 赤经:−0.57[1] mas/yr
赤纬:−18.85[1] mas/yr
视差 (π)5.70 ± 0.21[1] mas
距离570 ± 20 ly
(175 ± 6 pc)
绝对星等 (MV)−1.67[2]
详细资料
质量4.0[5] M
半径44[6] R
亮度761.44[2] L
温度4,370[5] K
金属量 [Fe/H]0.02[5] dex
自转速度 (v sin i)1.7[7] km/s
其他命名
6 CMi、​BD+12°1567、​FK5 1193、​GC 10024、​HD 59294、​HIP 36425、​HR 2864、​SAO 96952[8]
参考数据库
SIMBAD资料

水位一小犬6 6 Canis Minoris)是赤道星座小犬座的一颗恒星,距离太阳大约570光年。它是一颗肉眼可见,黯淡的橙色恒星,视星等为+4.55等[2]。这颗恒星正以日心点运动学−16.3 km/s 径向速度向地球靠近[4],它是属于天狼星超星系团英语Sirius#Star cluster membership的大熊座星流周边一个群的成员[9]

这是一颗演化的巨星恒星分类为K1 III.[3]。它有轻度的钡异常[10],这可能表明这是一颗有白矮星伴星的联星系统[11]。对可见分量的干涉量测-量测的角直径约为2.31±0.03 mas[12],估计其距离相当于约44倍太阳半径的物理半径[6]。质量约为4 太阳质量[5],在4,370k的有效温度[5],其扩大光球的辐射为太阳的761倍[2]

参考资料

  1. ^ 1.0 1.1 1.2 1.3 1.4 van Leeuwen, F., Validation of the new Hipparcos reduction, Astronomy and Astrophysics, 2007, 474 (2): 653–664, Bibcode:2007A&A...474..653V, S2CID 18759600, arXiv:0708.1752可免费查阅, doi:10.1051/0004-6361:20078357. 
  2. ^ 2.0 2.1 2.2 2.3 2.4 2.5 Anderson, E.; Francis, Ch., XHIP: An extended hipparcos compilation, Astronomy Letters, 2012, 38 (5): 331, Bibcode:2012AstL...38..331A, S2CID 119257644, arXiv:1108.4971可免费查阅, doi:10.1134/S1063773712050015. 
  3. ^ 3.0 3.1 Keenan, Philip C.; McNeil, Raymond C., The Perkins catalog of revised MK types for the cooler stars, Astrophysical Journal Supplement Series, 1989, 71: 245, Bibcode:1989ApJS...71..245K, doi:10.1086/191373. 
  4. ^ 4.0 4.1 Brown, A. G. A.; Vallenari, A.; Prusti, T.; de Bruijne, J. H. J.; et al. Gaia Data Release 2. Summary of the contents and survey properties. Astronomy & Astrophysics. 2018. Bibcode:2018A&A...616A...1G. arXiv:1804.09365可免费查阅. doi:10.1051/0004-6361/201833051.  VizieR中此天体在盖亚望远镜第二批数据发布的记录
  5. ^ 5.0 5.1 5.2 5.3 5.4 Gondoin, P., Evolution of X-ray activity and rotation on G-K giants, Astronomy and Astrophysics, December 1999, 352: 217–227, Bibcode:1999A&A...352..217G. 
  6. ^ 6.0 6.1 Lang, Kenneth R., Astrophysical formulae, Astronomy and astrophysics library 1 3rd, Birkhäuser, 2006 [2023-12-20], ISBN 3-540-29692-1, (原始内容存档于2023-07-28).  The radius (R*) is given by:
  7. ^ De Medeiros, J. R.; et al, Rotation and lithium in single giant stars, Astronomy and Astrophysics, November 2000, 363: 239–243, Bibcode:2000A&A...363..239D, arXiv:astro-ph/0010273可免费查阅. 
  8. ^ 6 CMi. SIMBAD. 斯特拉斯堡天文资料中心. 
  9. ^ Chupina, N. V.; et al, Kinematic structure of the corona of the Ursa Major flow found using proper motions and radial velocities of single stars, Astronomy and Astrophysics, June 2006, 451 (3): 909–916, Bibcode:2006A&A...451..909C, doi:10.1051/0004-6361:20054009可免费查阅. 
  10. ^ Escorza, A.; et al, Hertzsprung-Russell diagram and mass distribution of barium stars, Astronomy & Astrophysics, December 2017, 608: 13, Bibcode:2017A&A...608A.100E, S2CID 119428276, arXiv:1710.02029可免费查阅, doi:10.1051/0004-6361/201731832, A100. 
  11. ^ Eggleton, P. P.; Tokovinin, A. A., A catalogue of multiplicity among bright stellar systems, Monthly Notices of the Royal Astronomical Society, September 2008, 389 (2): 869–879, Bibcode:2008MNRAS.389..869E, S2CID 14878976, arXiv:0806.2878可免费查阅, doi:10.1111/j.1365-2966.2008.13596.x. 
  12. ^ Richichi, A.; et al, CHARM2: An updated Catalog of High Angular Resolution Measurements, Astronomy and Astrophysics, February 2005, 431 (2): 773–777, Bibcode:2005A&A...431..773R, doi:10.1051/0004-6361:20042039可免费查阅