庫樓四

半人馬座2
觀測資料
曆元 J2000.0
星座 半人馬座[1][2]
星官 库楼（角宿）
赤經 13h 49m 26.7s[1][2]
赤緯 -34° 27′ 3″[1][2]
視星等（V） 4.19[1][2]
特性
光谱分类M4.5III[1][2]
U−B 色指数1.45[1][2]
B−V 色指数1.5[1][2]
R−I 色指数1.81[1][2]
变星类型半规则变星
天体测定
徑向速度 (Rv)+41 km/s
自行 (μ) 赤经：−42.59 mas/yr
赤纬：−59.87 mas/yr
视差 (π)18.39 ± 0.74 mas
距离177.4 ly
(54.4 pc)
绝对星等 (MV)+0.51
其他命名
CD-33 9358，SAO 204875，HD 120323，HR 5192
參考資料庫
SIMBAD资料

库楼四（半人马座2，2 Cen / 半人马座g，g Cen）是半人馬座的一颗恒星[1][2]，视星等为4.19，位于銀經316.32，銀緯26.91，其B1900.0坐标为赤經13h 43m 38.9s，赤緯-33° 26.91′ 5″。

库楼四是一颗半规则变星，其亮度在+4.16到+4.26之间变化，周期为12天。

参考文献

  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2019-06-08）. 
  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2019-06-07）. 

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