后髮座40,又名BD+23 2538,HD 113866、SAO 82651、HR 4949,是后髮座的一顆恆星[1][2],視星等為5.6,位於銀經340.64,銀緯84.36,其B1900.0坐標為赤經13h 1m 30.5s,赤緯+23° 84.36′ 10″。
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