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A New Milky Way Dwarf Galaxy in Ursa Major
In this Letter, we report the discovery of a new dwarf satellite to the Milky Way, located at (α_2000, δ_2000) = (158.72,51.92) in the constellation of Ursa Major. This object was detected as an overdensity of red, resolved stars in Sloan Digital Sky Survey data. The color-magnitude diagram of the Ursa Major dwarf looks remarkably similar to that of Sextans, the lowest surface brightness Milky Way companion known, but with approximately an order of magnitude fewer stars. Deeper follow-updoi:10.1086/431760 fatcat:l4nm5curczer7gqq4oczv7ir24