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波斯二

波斯二
波斯二的位置 (红圈处)
觀測資料
曆元 J2000.0
星座 印第安座[1][2]
星官 近南极星区 波斯
赤經 20h 37m 34s[1][2]
赤緯 -47° 17′ 29″[1][2]
視星等(V) 3.11[1][2]
特性
光谱分类K0III
U−B 色指数0.79[1][2]
B−V 色指数1[1][2]
R−I 色指数0.36[1][2]
天体测定
徑向速度 (Rv)−1.3 km/s
自行 (μ) 赤经:+49.24 mas/yr
赤纬:+66.53 mas/yr
视差 (π)33.17 ± 0.18 mas
距离98.3 ± 0.5 ly
(30.1 ± 0.2 pc)
绝对星等 (MV)0.72
詳細資料
質量2.0 M
半徑10.5 R
溫度4,893 K
金属量 [Fe/H]+0.03 dex
年齡1 Gyr
其他命名
CD-4713477,SAO 230300,HD 196171,HR 7869
參考資料庫
SIMBAD资料

波斯二α Ind/印第安座α),是印第安座第一亮星,距离地球约98光年。该星的恒星分类为K0III,它已经耗尽了核心的氢并且演化离主序带。它有大约2倍太阳质量,大约10亿年。直径膨胀达到太阳的10.5倍,总光度约是太阳的55倍。表面温度为4,893K,散发着橙色调的光芒。它可能有2个近的M型伴星,它们距离主星至少2000天文单位

参考文献

[编辑]
  1. ^ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 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 VizieR Detailed Page. [2012-07-13]. (原始内容存档于2016-03-05). 
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波斯二
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