Messier 51, The Whirlpool Galaxy
The Whirlpool Galaxy in Ursa Major (The Big Dipper).
This monster spiral interacting galaxy pair is about 24 million light years from earth. With a decent size telescope you can easily make out the spiral shape under a dark sky.
Atik 314L+ Monochrome at -15C
12" F4 OTA with Sky Watcher F4 CC
Nautilus FW + Orion 2" RGB Filters
L - 30 X 3min
R, G, B, - 19 X 2min
DSS and Photoshop