大熊座18,又名BD+54 1285,HD 79439、SAO 27191、HR 3662,是大熊座的一顆恆星[1][2],視星等為4.83,位於銀經163.08,銀緯42.66,其B1900.0坐標為赤經9h 8m 59.6s,赤緯+54° 42.66′ 6″。
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