Picture taken on August 26th, 2011.
Location: Petrova gora, Croatia, Europe
SkyWatcher ED120/900, EQ6 SkyScan QHY8, TS OAG9mm, QHY5 guiding camera
Exposure time: 2 segment mozaic , each 8x900sec

Processing software: Nebulosity2, DeepSkyStacker, PixInsight LE, Photoshop CS5

Object info:
The Andromeda Galaxy is a spiral galaxy approximately 2,500,000 light-years (1.58�1011 AU) away[4] in the constellation Andromeda. It is also known as Messier 31, M31, or NGC 224, and is often referred to as the Great Andromeda Nebula in older texts. Andromeda is the nearest spiral galaxy to our own, the Milky Way, but not the closest galaxy overall.

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