Messier 102
Galaxy with a disputed and ambiguous identity / From Wikipedia, the free encyclopedia
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Messier 102 (also known as M102) is a galaxy listed in the Messier Catalogue that cannot be unambiguously identified. Its original discoverer Pierre Méchain retracted his discovery two years after publication and said that it was a duplicate observation of Messier 101.[1] Later historical evidence favors that M102 is actually the galaxy NGC 5866,[2] although other galaxies have been suggested as possible identities. The National Aeronautics and Space Administration (NASA) considers it to be the same as NGC 5866.[3]