NGC 7039 is an open star cluster in the constellation of Cygnus, the swan. It lies approximately 3100 light years away and contains approximately 100 stars. However, they are are difficult to discern as the cluster lies in a rich field of the Milky Way. Its stars are relatively young (i.e., 66 million years old). It was discovered by William Herschel in 1829.

152mm APM refractor

24 @ 5 min.

Images were focused using the camera's live view and a Bahtinov mask. They were converted in Canon Digital Photo Professional and were aligned and combined in ImagesPlus. The final image was adjusted in Photoshop. Topaz Detail and DeNoise were applied.

Taken from my backyard observatory in southeastern Minnesota on 6/25-26/17.