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天琴座δ

天琴座δ
观测资料
历元 J2000.0
星座 天琴座[1][2]
星官
赤经 18h 53m 43.6s[1][2]
赤纬 +36° 58′ 18″[1][2]
视星等(V) 5.58[1][2]
特性
光谱分类B2.5V+K2.5III[1][2]
U−B 色指数-0.66[1][2]
B−V 色指数-0.15[1][2]
R−I 色指数[1][2]
天体测定
径向速度 (Rv)-0.66 km/s
自行 (μ) 赤经:-26 mas/yr
赤纬:- mas/yr
其他命名
BD+36 3307,SAO 67537,HD 175426,HR 7131
参考数据库
SIMBAD资料

天琴座δ,又名BD+36 3307HD 175426SAO 67537HR 7131,是天琴座的一颗恒星[1][2],视星等为5.58,位于银经66.93,银纬15.49,其B1900.0坐标为赤经18h 50m 13.9s,赤纬+36° 15.49′ 48″。这对双星是一个非常奇异的天体,主星是5.6等的蓝白色矮星,质量有太阳的8-10倍之大,9.8等的伴星质量小得多,但是已经进入红巨星阶段。由于质量偏低,伴星光度比一般红巨星要小一些,大约是太阳的10倍亮。这对双星类似于大陵五双星,质量小的伴星演化快,而大的主星还是主序星,极有可能是激烈的质量交流所致。

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2016-03-18). 
  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2016-03-04). 
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天琴座δ
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