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金牛座119

金牛座119
觀測資料
曆元 J2000.0
星座 金牛座[1][2]
星官
赤經 5h 32m 12.8s[1][2]
赤緯 +18° 35′ 40″[1][2]
視星等(V) 4.38[1][2]
特性
光谱分类M2Iab-Ib[1][2]
U−B 色指数2.21[1][2]
B−V 色指数2.07[1][2]
R−I 色指数1.44[1][2]
天体测定
徑向速度 (Rv)2.21 km/s
自行 (μ) 赤经:23 mas/yr
赤纬:- mas/yr
视差 (π)1.79 mas
距离1822.1026815642 ly
(558.65921787709 pc)
詳細資料
質量12~16 M
半徑600 R
其他命名
BD+18 875,SAO 94628,HD 36389,HR 1845
參考資料庫
SIMBAD资料

金牛座119,又名BD+18 875HD 36389SAO 94628HR 1845,是金牛座的一颗恒星[1][2],它是一顆紅超巨星。它的视星等为4.38,位于銀經187.18,銀緯-8.07,其B1900.0坐标为赤經5h 26m 20.9s,赤緯+18° -8.07′ 12″。

物理特徵

[编辑]

金牛座119的質量大約是太陽的8倍(另有指它的質量是太陽的12-16倍,與心宿二相若),直徑大約是太陽的600倍,而亮度則為太陽的42000倍(亦有指它的亮度是太陽的60000倍)。它的表面溫度大約是3400k。金牛座119是一顆紅超巨星,亦有指它是一顆超漸近巨星分支星(比一般的漸近巨星分支類恆星的質量為高,大約是太陽的7-10倍。)金牛座119與大多的紅超巨星的命運一樣,它將會會爆炸為超新星,並之後形成一顆中子星。即使它是超漸近巨星分支星,它亦會透過電子捕獲的方式成為一顆超新星。

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 HR 1845 请检查|url=值 (帮助). sim-id. [2020-10-09]. [失效連結]
  2. ^ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 VizieR. vizier.u-strasbg.fr. [2020-10-09]. (原始内容存档于2019-07-01). 
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金牛座119
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