Spitzer found that halo around the Sombrero Galaxy is larger and more massive than previously thought, indicative of a giant elliptical galaxy . The galaxy has an apparent magnitude of + 9.0, making it easily visible with amateur telescope, and it's considered by some authors to be the brightest galaxy within of 10 megaparsecs of the Milky Way.
Sombrero Galaxy: Hidden Double in a Hat. The Sombrero Galaxy, also called M104 or NGC 4594, is about 28 million light-years from our planet in the constellation Virgo. It is so named because the halo surrounding its disc is unusually large, making it look like a sombrero.