天鵝座V1773,又名BD+45 3139,HD 193536、SAO 49462、HR 7777,是天鵝座的一顆恆星[1][2],視星等為6.45,位於銀經82.82,銀緯5.8,其B1900.0坐標為赤經20h 15m 37.2s,赤緯+46° 5.8′ 31″。
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