Object Type:Globular cluster
Also known as Omega Centauri, NGC 5139 is the largest and brightest globular cluster associated with the Milky Way galaxy. It has an estimated mass of 5 million solar masses, many times that of other large globular clusters such as M13 which has about 600,000 solar masses. Unlike other globular clusters, NGC 5139 has several different populations of stars which formed at different times over a 2 billion year period, which suggests that it may be the remnant core of a galaxy which merged with the Milky Way.
102-ED/ST-10XME/Astrodon RGB filters/Losmandy G-11/Gemini