大熊座73,又名BD+56 1598,HD 108502、SAO 28394、HR 4745,是大熊座的一顆恆星[1][2],視星等為5.7,位於銀經129.89,銀緯61.09,其B1900.0坐標為赤經12h 22m 49.7s,赤緯+56° 61.09′ 59″。
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