Equipment and other photo info:
Picture taken on June 17th, 2012.
Location: Petrova Gora, Croatia
Celestron C10N, Baader MPCC, TS OAG9mm, QHY8, QHY5 guiding camera
Exposure time: 13x300sec
Mount: NEQ6 SynScan PRO
Processing software: Nebulosity, DeepSkyStacker, PixInsight 1.0 LE, Photoshop CS5
Processing software: DeepSkyStacker, PixInsight 1.0, Photoshop CS2

Object info:
Messier 15 or M15 (also designated NGC 7078) is a globular cluster in the constellation Pegasus. It was discovered by Jean-Dominique Maraldi in 1746 and included in Charles Messier’s catalogue of comet-like objects in 1764. At an estimated 12.0 billion years old, it is one of the oldest known globular clusters.

More information about this object at: http://en.wikipedia.org/wiki/Messier_15