天垒城八
观测资料 历元 J2000 | |
---|---|
星座 | 宝瓶座 |
星官 | 天垒城(虚宿) |
赤经 | 21h 01m 08.33321s[1] |
赤纬 | -13° 31′ 47.9702″[1] |
视星等(V) | 6.55[2] |
特性 | |
光谱分类 | G6/8III[3] |
天体测定 | |
径向速度 (Rv) | 22.8 ± 2[4] km/s |
自行 (μ) | 赤经:-0.22[1] mas/yr 赤纬:5.41[1] mas/yr |
视差 (π) | 4.69 ± 0.60[1] mas |
距离 | approx. 700 ly (approx. 210 pc) |
其他命名 | |
参考数据库 | |
SIMBAD | 资料 |
天垒城八(宝瓶座9,9 Aqr)是位于宝瓶座,光谱G8III的黄色巨星[3],视星等 6.55[2]。宝瓶座9是佛氏命名法赋予的名称。
参考资料
- ^ 1.0 1.1 1.2 1.3 1.4 van Leeuwen, F.; et al. Validation of the new Hipparcos reduction. Astronomy and Astrophysics. 2007, 474 (2): 653–664. Bibcode:2007A&A...474..653V. arXiv:0708.1752 . doi:10.1051/0004-6361:20078357.
- ^ 2.0 2.1 Høg, E.; et al. The Tycho-2 catalogue of the 2.5 million brightest stars. Astronomy and Astrophysics. 2000, 355: L27–L30. Bibcode:2000A&A...355L..27H.
- ^ 3.0 3.1 Houk, N.; Smith-Moore, M. Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars. Volume 4, Declinations -26°.0 to -12°.0.. Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars. 1988, 4. Bibcode:1988mcts.book.....H.
- ^ Wilson, Ralph Elmer. General catalogue of stellar radial velocities. 1953. Bibcode:1953GCRV..C......0W.
- ^ * 9 Aqr. SIMBAD. 斯特拉斯堡天文资料中心. [28 January 2018].