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渐台增四

天琴座λ
观测资料
历元 J2000.0
星座 天琴座[1][2]
星官
赤经 19h 0m 0.9s[1][2]
赤纬 +32° 8′ 44″[1][2]
视星等(V) 4.93[1][2]
特性
光谱分类K2.5IIBa0.5[1][2]
U−B 色指数1.67[1][2]
B−V 色指数1.47[1][2]
R−I 色指数0.73[1][2]
天体测定
径向速度 (Rv)1.67 km/s
自行 (μ) 赤经:-16 mas/yr
赤纬:- mas/yr
视差 (π)2.12 mas
距离1538.473490566 ly
(471.69811320755 pc)
其他命名
BD+31 3424,SAO 67682,HD 176670,HR 7192
参考数据库
SIMBAD资料

天琴座λ,又名BD+31 3424HD 176670SAO 67682HR 7192,是天琴座的一颗恒星[1][2],视星等为4.93,位于银经62.91,银纬12.38,其B1900.0坐标为赤经18h 56m 14.4s,赤纬+32° 12.38′ 20″。该星是一个橙红色亮巨星,距离我们1550光年。绝对星等为-3.7.总的辐射能量预计为太阳的8000倍,该星表面温度为4250K,远低于太阳,因此该星之所以有如此高的亮度均得益于巨大的体积。该星的直径为太阳的170倍,根据光度推算其质量为8个太阳质量。

参考文献

[编辑]
  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]. (原始内容存档于2019-08-18). 
  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2019-08-16). 
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渐台增四
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