M 109 (also known as NGC 3992) is a spiral galaxy barred about 55 million light years, in the constellation Ursa Major.
It has an angular extension of about 7-8 arc minutes, an apparent magnitude of 9.5 and a real diameter of about 130,000 light years.
Image obtained from my home terrace in conditions of strong light pollution.
Optic Celestron C9.25 Edge HD f/10
Mount Losmandy G11 with Ovision worm and FS2
Camera Atik 4000 with Starlight Xpress filter wheel 5 positions
Filters Hutech Idas LPS-P2 50.8 unmounted
Guiding system OAG LB Astro Proxima with Lodestar
Exposure details L 52x600" bin1 -20C
Total integration 8,7h
Acquisition Maxim, PHD2
Processing Maxim, Photoshop CS5
Location Home terrace (Rescaldina, Italy)
Date 5 February 2016, 10 March 2016