仙王座4(天钩一),又名BD+66 1318,HD 197950、SAO 19004、HR 7945,是仙王座的一颗恒星[1][2],视星等为5.58,位于银经101.72,银纬14.68,其B1900.0坐标为赤经20h 41m 56.1s,赤纬+66° 14.68′ 38″。
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