墳墓二
寶瓶座γ,中名墳墓二[8],又名HD 212061,HR 8518,SAO 146044等，是位於寶瓶座的一顆恆星，視星等3.85，距地球約164光年。
 | |
| 觀測資料 曆元 J2000 | |
|---|---|
| 星座 | 寶瓶座 |
| 星官 | 墳墓 (危宿) |
| 赤經 | 22h 21m 39.37542s[1] |
| 赤緯 | –01° 23′ 14.4031″[1] |
| 視星等（V） | 3.849[2] |
| 特性 | |
| 光譜分類 | A0 V[3] |
| U−B 色指數 | –0.092[2] |
| B−V 色指數 | –0.060[2] |
| 天體測定 | |
| 徑向速度 (Rv) | –15[4] km/s |
| 自行 (μ) | 赤經：+129.53[1] mas/yr 赤緯：+7.77[1] mas/yr |
| 視差 (π) | 19.92 ± 1.04[1] mas |
| 距離 | 164 ± 9 ly (50 ± 3 pc) |
| 詳細資料 | |
| 表面重力 (log g) | 4.0[5] |
| 溫度 | 10,500[5] K |
| 金屬量 [Fe/H] | +0.30[5] dex |
| 自轉速度 (v sin i) | 80[6] km/s |
| 其他命名 | |
參考資料
- ^ 1.0 1.1 1.2 1.3 1.4 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.
- ^ 2.0 2.1 2.2 Cousins, A. W. J., Standardization of Broadband Photometry of Equatorial Standards, South African Astronomical Observatory Circulars, 1984, 8: 59, Bibcode:1984SAAOC...8...59C.
- ^ Cowley, A.; et al, A study of the bright A stars. I. A catalogue of spectral classifications, Astronomical Journal, April 1969, 74: 375–406, Bibcode:1969AJ.....74..375C, doi:10.1086/110819.
- ^ Wilson, Ralph Elmer, General Catalogue of Stellar Radial Velocities, Washington: Carnegie Institution of Washington, 1953, Bibcode:1953QB901.W495......
- ^ 5.0 5.1 5.2 Baschek, Bodo; Searle, Leonard, The Chemical Composition of the Lambda Bootis Stars, Astrophysical Journal, February 1969, 155: 537, Bibcode:1969ApJ...155..537B, doi:10.1086/149890.
- ^ Royer, F.; Zorec, J.; Gómez, A. E., Rotational velocities of A-type stars. III. Velocity distributions, Astronomy and Astrophysics, February 2007, 463 (2): 671–682, Bibcode:2007A&A...463..671R, arXiv:astro-ph/0610785 , doi:10.1051/0004-6361:20065224.
- ^ gam Aqr -- Star in double system, SIMBAD Astronomical Object Database (Centre de Données astronomiques de Strasbourg), [2012-08-20], （原始內容存檔於2020-01-11）.
- ^ 香港太空館 - 研究資源 - 亮星中英對照表 互聯網檔案館的存檔，存檔日期2008-10-25., Hong Kong Space Museum. Accessed on line November 23, 2010.
