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NGC 4556 is an elliptical galaxy and a cD galaxy located 340 million light-years away in the constellation Coma Berenices. It was discovered on April 11, 1785, by astronomer William Herschel. NGC 4556 is a member of a group of 12 galaxies known as [T2015] nest 100082, or the NGC 4555 Group, and is part of the Coma Supercluster.
NGC 4556 is host to a supermassive black hole with an estimated mass of 1.1 × 10 M☉.
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Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).