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来自维基百科,自由的百科全书
北极四,又称后宫或小熊座 4(4 Ursae Minoris、缩写为 4 UMi),又名BD+78 478,HD 124547、SAO 7958、HR 5321,是小熊座的一颗恒星[1][2],视星等为4.82,位于银经117.67,银纬38.78,其B1900.0坐标为赤经14h 9m 13.9s,赤纬+78° 38.78′ 3″。
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