圓規座γ
圓規座γ （γ Cir）是位於圓規座的恆星系統，視星等4.51[2]，距地球450光年。赫歇爾於1835年發現這是一對聯星，並估算兩顆子星的角距離為1弧秒[10]。
  | |
| 觀測資料 曆元 J2000.0 | |
|---|---|
| 星座 | 圓規座 |
| 星官 | |
| 赤經 | 15h 23m 22.64294s[1] |
| 赤緯 | −59° 19′ 14.8131″[1] |
| 視星等（V） | 4.51[2] (4.94 + 5.73)[3] |
| 特性 | |
| 光譜分類 | B5 IV[4] + F8 V[2] |
| 變星類型 | Be[5] |
| 天體測定 | |
| 徑向速度 (Rv) | 16.90±1.78[6] km/s |
| 自行 (μ) | 赤經：−12.97[1] mas/yr 赤緯：−34.24[1] mas/yr |
| 視差 (π) | 7.27 ± 0.81[1] mas |
| 距離 | approx. 450 ly (approx. 140 pc) |
| 絕對星等 (MV) | −2.3/−2.6 |
| 軌道[4] | |
| 繞行週期 (P) | 258 yr |
| 半長軸 (a) | 2.576" |
| 偏心率 (e) | 0.931 |
| 詳細資料 | |
| γ Cir A | |
| 質量 | 6.0±0.3[7] M☉ |
| 溫度 | 15,135[8] K |
| 年齡 | 63.1±19.6[7] Myr |
| γ Cir B | |
| 溫度 | 4,786[8] K |
| 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, 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 Buscombe, W.; Barkstrom, B., The composite spectrum of gamma Circini, Monthly Notices of the Royal Astronomical Society, 1971, 152: 37−45, Bibcode:1971MNRAS.152...37B, doi:10.1093/mnras/152.1.37.
- ^ Mason, B. D.; et al, The Washington Visual Double Star Catalog, 2014 [2015-07-22], Bibcode:2001AJ....122.3466M, doi:10.1086/323920, （原始內容存檔於2019-07-04）
- ^ 4.0 4.1 Malkov, O. Yu.; et al, Dynamical masses of a selected sample of orbital binaries, Astronomy & Astrophysics, 2012, 546: A69, Bibcode:2012A&A...546A..69M, doi:10.1051/0004-6361/201219774.
- ^ Kazarovets, E. V.; et al. The 74th Special Name-list of Variable Stars. Information Bulletin on Variable Stars. 1999, 4659: 1. Bibcode:1999IBVS.4659....1K.
- ^ de Bruijne, J. H. J.; Eilers, A.-C., Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project, Astronomy & Astrophysics, October 2012, 546: 14, Bibcode:2012A&A...546A..61D, arXiv:1208.3048 , doi:10.1051/0004-6361/201219219, A61.
- ^ 7.0 7.1 Tetzlaff, N.; et al, A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun, Monthly Notices of the Royal Astronomical Society, January 2011, 410 (1): 190–200, Bibcode:2011MNRAS.410..190T, arXiv:1007.4883 , doi:10.1111/j.1365-2966.2010.17434.x.
- ^ 8.0 8.1 Parsons, Sidney B., New and Confirmed Triple Systems with Luminous Cool Primaries and Hot Companions, The Astronomical Journal, May 2004, 127 (5): 2915−2930, Bibcode:2004AJ....127.2915P, doi:10.1086/383546.
- ^ gam Cir -- Double or multiple star, SIMBAD Astronomical Database (Centre de Données astronomiques de Strasbourg), [2017-01-13], （原始內容存檔於2017-01-19）.
- ^ Carette, E.; et al, γ Circinus: a young visual binary with pre-main-sequence component(s)?, Astronomy and Astrophysics, April 1995, 296: 139, Bibcode:1995A&A...296..139C.
