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来自维基百科,自由的百科全书
天龍座49,又名BD+55 2137,HD 177249、SAO 31323、HR 7218,是天龍座的一颗恒星[1][2],视星等为5.48,位于銀經85.83,銀緯20.86,其B1900.0坐标为赤經18h 58m 44.6s,赤緯+55° 20.86′ 54″。
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