M6 is an open cluster of stars found in the constellation of Scorpius. It has a diameter of about 20 light years and lies about 2,000 light years from Earth. This cluster is composed mainly of blue and white stars with the brightest being a yellow or orange giant. The shape of this cluster somewhat resembles that of a butterfly, giving rise to its more common name, the butterfly cluster. At magnitude 5.3 it is an easy find with binoculars.