Ruprecht 147 or NGC 6774 is a dispersed star cluster in the Milky Way galaxy.

It is about 1,000 light years away, which is close to Earth in comparison with other such clusters.

[2] The cluster, discovered in 1830 by John Herschel, was sometimes thought to be an asterism (a random collection of stars) due to its sparseness and location against the background of the richest part of the Milky Way, and also since the brightest stars in this old cluster perished long ago.

In 1966 the Czech astronomer Jaroslav Ruprecht classified it as a type III 2 m open cluster under the Trumpler scheme.

[4][5] Ruprecht 147 has five detached eclipsing binary stars that are relatively bright, and thus easy to observe.