后髮座20,又名BD+21 2424,HD 108765、SAO 82336、HR 4756,是后髮座的一顆恆星[1][2],視星等為5.69,位於銀經263.27,銀緯82.04,其B1900.0坐標為赤經12h 24m 41.8s,赤緯+21° 82.04′ 0″。
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