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天市左垣十一

天市左垣十一
观测资料
历元 J2000
星座 蛇夫座
星官 天市垣 天市左垣
赤经 17h 10m 22.7s
赤纬 -15° 43′ 29.7″
视星等(V) 2.43 (3.0/3.5)
特性
光谱分类A2.5 Va/A3 V
U−B 色指数0.09
B−V 色指数0.05
变星类型?
天体测定
径向速度 (Rv)-2.4 km/s
自行 (μ) 赤经:41.16 mas/yr
赤纬:97.65 mas/yr
视差 (π)38.77 ± 0.86 mas
距离84.1 ly
(25.79 pc)
绝对星等 (MV)0.37
详细资料
质量2.3/2.0 M
半径2.5/2.0 R
亮度35/21 L
温度8900/8600 K
金属量?
自转30 km/s.
年龄?
其他命名
35 Oph, Gl 656.1A/B, HD 155125, HR 6378, BD -15°4467, GCTP 3895.00, SAO 160332, HIP 84012
参考数据库
SIMBAD资料

天市左垣十一(蛇夫座η)也称,又名BD-15 4467HD 155125SAO 160332HR 6378,是蛇夫座双星系统,在中国古代星官名系统中属于三垣中天市垣,为天市左垣第十一星。

天市左垣十一实际上是一个用业余天文望远镜难以区分开的双星系统,但用更先进的手段可以测定出来。其主星蛇夫座η A仅仅比蛇夫座η B稍大,温度也稍高。两颗恒星都是不引人注目的A型主序星,但作为双星系统,它们并不寻常。它们沿扁率很大的椭圆轨道绕公共质心旋转地速度如此之快,以至于不可能形成行星系统,一些恒星数据也不甚精确。

天市左垣十一天王星北极星

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天市左垣十一
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