格利澤185
格利澤185是位於天兔座的一個聯星系統，他與太陽系的距離大約是27.2光年。這顆恆星大約在35,000年後會最靠近太陽，屆時的距離大約是14.8光年 (4.5秒差距)[6]。
| 觀測資料 曆元 J2000 | |
|---|---|
| 星座 | 天兔座 |
| 星官 | |
| 赤經 | 05h 02m 28.4215s[1] |
| 赤緯 | −21° 15′ 23.921″[1] |
| 視星等（V） | 8.36[2] |
| 特性 | |
| 光谱分类 | M0 V[3] |
| 天体测定 | |
| 徑向速度 (Rv) | −15.2[4] km/s |
| 自行 (μ) | 赤经：−141.56[1] mas/yr 赤纬：−221.75[1] mas/yr |
| 视差 (π) | 117.38 ± 1.81[1] mas |
| 距离 | 27.8 ± 0.4 ly (8.5 ± 0.1 pc) |
| 軌道[2] | |
| 繞行週期 (P) | 43.55 ± 0.27 yr |
| 半長軸 (a) | 1.062 ± 0.049" |
| 偏心率 (e) | 0.720 ± 0.028 |
| 倾斜角 (i) | 60.7 ± 2.1° |
| 升交点黃經 (Ω) | 246.5 ± 3.9° |
| 近心点 曆元 (T) | B 1997.46 ± 0.86 |
| 近心點幅角 (ω) (secondary) | 280.6 ± 1.2° |
| 其他命名 | |
參考資料
- ^ 1.0 1.1 1.2 1.3 1.4 Perryman, M. A. C.; et al.. The HIPPARCOS Catalogue. Astronomy & Astrophysics. July 1997, 323: L49–L52. Bibcode:1997A&A...323L..49P.
- ^ 2.0 2.1 Sixth Catalog of Orbits of Visual Binary Stars. United States Naval Observatory. [2023-04-12]. （原始内容存档于2017-08-01）.
- ^ 3.0 3.1 Koen, C.; Kilkenny, D.; van Wyk, F.; Cooper, D.; Marang, F. UBV(RI)C photometry of Hipparcos red stars. Monthly Notices of the Royal Astronomical Society. July 2002, 334 (1): 20–38. Bibcode:2002MNRAS.334...20K. doi:10.1046/j.1365-8711.2002.05403.x.
- ^ Evans, D. S. The Revision of the General Catalogue of Radial Velocities. Batten, Alan Henry; Heard, John Frederick (编). Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30. University of Toronto: International Astronomical Union. June 20–24, 1966 [2009-09-10]. （原始内容存档于2019-06-26）.
- ^ LTT 2151 -- High proper-motion Star. SIMBAD. Centre de Données astronomiques de Strasbourg. [2010-04-06]. （原始内容存档于2019-08-18）.
- ^ García-Sánchez, J.; Weissman, P. R.; Preston, R. A.; Jones, D. L.; Lestrade, J.-F.; Latham, D. W.; Stefanik, R. P.; Paredes, J. M. Stellar encounters with the solar system. Astronomy and Astrophysics. 2001, 379 (2): 634–659. Bibcode:2001A&A...379..634G. doi:10.1051/0004-6361:20011330. See Table 4, p. 644.