尾宿四

尾宿四

尾宿四的位置(红圈处)
觀測資料 曆元 J2000
星座	天蝎座
星官
赤經	17^h 12^m 09.19565^s[1]
赤緯	–43° 14′ 21.0905″[1]
視星等（V）	3.33[2]
特性
光谱分类	F5 IV[3]
U−B 色指数	+0.09[2]
B−V 色指数	+0.41[2]
天体测定
徑向速度 (Rv)	–27.0[4] km/s
自行 (μ)	赤经：+24.47[1] mas/yr 赤纬：–288.55[1] mas/yr
视差 (π)	44.39 ± 0.16[1] mas
距离	73.5 ± 0.3 ly (22.53 ± 0.08 pc)
绝对星等 (MV)	+1.58[5]
詳細資料
質量	1.75[6] M☉
表面重力 (log g)	3.10[3]
亮度	17.7[6] L☉
溫度	6,519[3] K
金属量 [Fe/H]	0.05[5] dex
自轉速度 (v sin i)	150.0[6] km/s
年齡	1.1[5] Gyr
其他命名
η Sco, CD-43 11485, FK5 638, GJ 657, HD 155203, HIP 84143, HR 6380, SAO 227707.[7]
參考資料庫
SIMBAD	资料

尾宿四（天蝎座η）是一颗位于天蝎座的恒星，其视星等为3.33^[2]。

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. Bok, B. J.; Bok, P. F.; Miller, E. W., Photometric standards for the southern hemisphere. II, Astronomical Journal, November 1972, 77: 733, Bibcode:1972AJ.....77..733B, doi:10.1086/111346 
3. Gray, R. O.; et al, Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 pc-The Southern Sample, The Astronomical Journal, July 2006, 132 (1): 161–170, Bibcode:2006AJ....132..161G, arXiv:astro-ph/0603770 , doi:10.1086/504637 
4. 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], （原始内容存档于2019-06-26）  |booktitle=被忽略 (帮助)
5. Holmberg, J.; Nordstrom, B.; Andersen, J. The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics. Astronomy and Astrophysics. July 2009, 501 (3): 941–947. Bibcode:2009A&A...501..941H. arXiv:0811.3982 . doi:10.1051/0004-6361/200811191. 
6. Mallik, Sushma V.; Parthasarathy, M.; Pati, A. K., Lithium and rotation in F and G dwarfs and subgiants, Astronomy and Astrophysics, October 2003, 409: 251–261, Bibcode:2003A&A...409..251M, doi:10.1051/0004-6361:20031084 
7. LTT 6848 -- High proper-motion Star, SIMBAD (Centre de Données astronomiques de Strasbourg), [2012-02-10], （原始内容存档于2020-11-05）