雙子座9,又名BD+23 1275,HD 43384、SAO 78176、HR 2240,是雙子座的一顆恆星[1][2],視星等為6.25,位於銀經187.99,銀緯3.53,其B1900.0坐標為赤經6h 10m 52.6s,赤緯+23° 3.53′ 29″。
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