天鵝座57,又名BD+43 3755,HD 199081、SAO 50180、HR 8001,是天鵝座的一颗恒星[1][2],视星等为4.78,位于銀經84.9,銀緯-0.19,其B1900.0坐标为赤經20h 49m 42.5s,赤緯+44° -0.19′ 31″。
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