About image
NGC 3184 is a beautiful spiral galaxy in the Great Bear.
It has magnitude 10.3 and apparent size of 7.4 'for 6.9'.
The estimated distance is 30 million light years, with an extension of about 65,000 light years, so it is a galaxy a little smaller than our Milky Way.
In the image you can also see some weak and remote field galaxies.

Technical data
Optic         Celestron C9.25 Edge HD f/10
Mount       10Micron GM1000 HPS
Camera           Atik 4000 with Starlight Xpress filter wheel 5 positions
Filters        Baader 50.8 unmounted
Guiding system      Starlight Xpress SXV-AO-LF with OAG, Lodestar
Exposure details    L 25x600", bin1 -20C
Total integration    4.2h
Acquisition        Maxim, PHD2
Processing        Pixinsight 1.8, Photoshop CS5
SQM-L         21.40    
Location         Pian dell'Armà (Italy)
Date            18 February 2017