后发座40,又名BD+23 2538,HD 113866、SAO 82651、HR 4949,是后发座的一颗恒星[1][2],视星等为5.6,位于银经340.64,银纬84.36,其B1900.0坐标为赤经13h 1m 30.5s,赤纬+23° 84.36′ 10″。
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