双子座9,又名BD+23 1275,HD 43384、SAO 78176、HR 2240,是双子座的一颗恒星[1][2],视星等为6.25,位于银经187.99,银纬3.53,其B1900.0坐标为赤经6h 10m 52.6s,赤纬+23° 3.53′ 29″。
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