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来自维基百科,自由的百科全书
来自维基百科,自由的百科全书
天龍座54,又名BD+57 1968,HD 180610、SAO 31497、HR 7309,是天龍座的一颗恒星[1][2],视星等为4.99,位于銀經88.52,銀緯19.81,其B1900.0坐标为赤經19h 12m 8s,赤緯+57° 19.81′ 57″。
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