Messier 15 (M15, or NGC 7078) is a globular cluster at the western end of the constellation Pegasus. It is one of the most compact globular clusters known. It is about 33,600 light years away, and has a visual magnitude of 6.2 so under dark skies it is almost visible to the naked eye.
Here’s my photo:
Photo location: Monifieth (near Dundee), Scotland, UK.
Date: 23 Sep 2015; 20:00 UTC.
Telescope: 11-inch Celestron SCT.
Camera: Pentax K3
Exposure: ISO 800, 40 20-second exposures stacked with DeepSkyStacker.