星宿五

長蛇座27
觀測資料
曆元 J2000.0
星座 長蛇座[1][2]
星官
赤經 9h 20m 29s[1][2]
赤緯 -9° 33′ 21″[1][2]
視星等(V) 4.8[1][2]
特性
光谱分类G8III-IV+F5V[1][2]
U−B 色指数0.67[1][2]
B−V 色指数0.93[1][2]
R−I 色指数0.44[1][2]
天体测定
徑向速度 (Rv)0.67 km/s
自行 (μ) 赤经:25 mas/yr
赤纬:- mas/yr
视差 (π)0.022 mas
距离148252.9 ly
(45454.545454545 pc)
其他命名
BD-08 2643,SAO 136768,HD 80586,HR 3709
參考資料庫
SIMBAD资料

長蛇座27,又名BD-08 2643HD 80586SAO 136768HR 3709,是長蛇座的一颗恒星[1][2],视星等为4.8,位于銀經241.08,銀緯27.11,其B1900.0坐标为赤經9h 15m 36s,赤緯-9° 27.11′ 53″。

亞恆星伴星

日本岡山天體物理觀測所的系外行星搜尋團隊於2008年下半年發表關於一系列已經過主序星演化階段恆星徑向速度觀測的論文,論文中指出有亞恆星天體和星宿五組成聯星系統[3]。該天體的軌道週期約9.3年,但尚未有行星被確認。

星宿五的行星系
成員
(依恆星距離)
质量 半長軸
(AU)
轨道周期
()
離心率 傾角 半径
b (未确认) ≥10 MJ ≈5.9 3400 ?

参考文献

  1. ^ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 Pulsating variable Star. SIMBAD. Centre de Données astronomiques de Strasbourg. [2012-07-13]. 
  2. ^ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 VizieR Detailed Page. [2012-07-13]. (原始内容存档于2016-03-05). 
  3. ^ Toyota; et al. Radial Velocity Search for Extrasolar Planets in Visual Binary Systems. Publications of the Astronomical Society of Japan. 2008, 61 (1): 19–28. Bibcode:2009PASJ...61...19T. 

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