金牛座V773

金牛座V773是在黃道星座金牛座的年輕聚星，位於它的中心區域。這是一顆金牛T星型變星，其視星等範圍從10.59到10.95，它太黯淡了，因此肉眼看不見。根據各種估計，該系統距離太陽約433光年。它位於林茲1495（Lynds 1495）暗星雲的附近。 軌道層次 這個系統在1974年被呂德格倫（a.E.Rydgren）及其同事確認為金牛T星。1983年，從這個來源探測到無線電發射。在1993年，它被發現是一顆雙星，角距離約為6993727220521664305♠150 mas：這兩個成員被指定為A和B。成員A被發現是具有51天軌道週期的雙線光譜聯星。在2003年，發現該系統的第三顆成員，成員C，與成員A的角距離為6994124112302364041♠256 mas。 A–B對的軌道解為B成員提供了出乎意料的高動態質量（英语：dynamic mass）7000269000000000000♠2.69±0.67 太陽質量，這表明它也可能是一個聯星系統。一顆質量如此之大的恆星光度是太陽的17倍，這與觀測到的光學光度不一致。對成員B的光度測定表明，它正沿著視線從塵埃中經歷消光。該成員在K波段是可變的，這與軌道上的塵埃團或雲一致。 2010年，在金牛座V773系統中觀測到了一次擴展的星食。這被解釋為成員B的環雙星盤從成員A的前面經過。星食遮蔽了成員A 70%的發射，並持續了150天。 MAST: Barbara A. Mikulski Archive for Space Telescopes, Space Telescope Science Institute, [8 December 2021], （原始内容存档于2023-03-27）.  Kenworthy, M. A.; et al, Eclipse of the V773 Tau B circumbinary disc, Astronomy & Astrophysics, October 2022, 666: A61, Bibcode:2022A&A...666A..61K, S2CID 250451004, arXiv:2207.05575 , doi:10.1051/0004-6361/202243441, A61.  Brown, A. G. A.; et al. 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