牧夫座ο,又名BD+17 2780,HD 129972、SAO 101184、HR 5502,是牧夫座的一颗恒星[1][2],视星等为4.6,位于银经17.74,银纬61.82,其B1900.0坐标为赤经14h 40m 34.4s,赤纬+17° 61.82′ 16″。
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