武仙座21,又名BD+07 3164,HD 147869、SAO 121568、HR 6111,是武仙座的一颗恒星[1][2],视星等为5.85,位于银经21.3,银纬35.77,其B1900.0坐标为赤经16h 19m 18.5s,赤纬+7° 35.77′ 45″。
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