尾宿增二

尾宿增二（天蝎座μ2）是一颗位于天蝎座的恒星，其视星等为3.56等，亮度足以用肉眼看到。根据视差测量值，尾宿增二与太阳的距离约为474光年，也是天蝎-半人马星协成员之一^[11]。

尾宿增二

观测资料 历元 J2000
星座	天蝎座
星官
赤经	16h 52m 20.14532s[1]
赤纬	−38° 01′ 03.1258″[1]
视星等（V）	+3.56[2]
特性
光谱分类	B2 IV[3]
U−B 色指数	−0.878[2]
B−V 色指数	−0.219[2]
天体测定
径向速度 (Rv)	+1.4[4] km/s
自行 (μ)	赤经：−11.09[1] mas/yr 赤纬：−23.32[1] mas/yr
视差 (π)	6.88 ± 0.12[1] mas
距离	474 ± 8 ly (145 ± 3 pc)
绝对星等 (MV)	−2.25[5]
详细资料
质量	7000869999999999999♠8.7±0.2[6] M☉
半径	7.0[7] R☉
亮度	2,385[8] L☉
温度	23,113[7] K
自转速度 (v sin i)	58[9] km/s
年龄	7001185000000000000♠18.5±3.2[6] Myr
其他命名
Pipirima, μ² Scorpii, CD−37° 11037, HD 151985, HIP 82545, HR 6252, SAO 208116.[10]
参考数据库
SIMBAD	资料

性质

尾宿增二是一颗蓝白色B型亚巨星，恒星分类为B2 IV^[3] 。跟据天文学家估计，它的半径是太阳的7倍，质量几乎是太阳的9倍^[6]，光度是太阳的2,385倍^[8]。外层大气的有效温度为23,113 K^[7]。它大约有1,850万年的历史，并以58公里/秒的速度自转^[9]。

参考文献

1. 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. Gutierrez-Moreno, Adelina; Moreno, Hugo, A photometric investigation of the Scorpio-Centaurus association, Astrophysical Journal Supplement, June 1968, 15: 459, Bibcode:1968ApJS...15..459G, doi:10.1086/190168.
3. Hiltner, W. A.; et al, MK Spectral Types for Bright Southern OB Stars, The Astrophysical Journal, July 1969, 157: 313, Bibcode:1969ApJ...157..313H, doi:10.1086/150069.
4. Evans, D. S., Batten, Alan Henry; Heard, John Frederick , 编, The Revision of the General Catalogue of Radial Velocities, Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30 (University of Toronto: International Astronomical Union), June 20–24, 1966, Bibcode:1967IAUS...30...57E.
5. Anderson, E.; Francis, Ch., XHIP: An extended hipparcos compilation, Astronomy Letters, 2012, 38 (5): 331, Bibcode:2012AstL...38..331A, arXiv:1108.4971 , doi:10.1134/S1063773712050015.
6. Tetzlaff, N.; et al, A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun, Monthly Notices of the Royal Astronomical Society, 2011, 410: 190–200, Bibcode:2011MNRAS.410..190T, arXiv:1007.4883 , doi:10.1111/j.1365-2966.2010.17434.x.
7. Underhill, A. B.; et al, Effective temperatures, angular diameters, distances and linear radii for 160 O and B stars, Monthly Notices of the Royal Astronomical Society, November 1979, 189: 601–605, Bibcode:1979MNRAS.189..601U, doi:10.1093/mnras/189.3.601.
8. McDonald, I.; et al, Fundamental Parameters and Infrared Excesses of Hipparcos Stars, Monthly Notices of the Royal Astronomical Society, 2012, 427 (1): 343–57, Bibcode:2012MNRAS.427..343M, arXiv:1208.2037 , doi:10.1111/j.1365-2966.2012.21873.x.
9. Uesugi, Akira; Fukuda, Ichiro, Catalogue of rotational velocities of the stars, Contributions from the Institute of Astrophysics and Kwasan Observatory (University of Kyoto), 1970, Bibcode:1970crvs.book.....U.
10. mu.02 Sco -- Variable Star, SIMBAD Astronomical Database (Centre de Données astronomiques de Strasbourg), [2016-09-20], （原始内容存档于2020-11-05）.
11. ^ 引用错误：没有为名为Bobylev2007的参考文献提供内容

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