The Sombrero Galaxy (M104, NGC 4594 and others) is an unbarred spiral galaxy located approximately 28 million light-years away in Virgo.
Luminance – 24x600s – 240 minutes – binned 1x1
RGB – 8x300s – 40 minutes each – binned 2x2
360 minutes total exposure – 6 hours
Imaged over five nights in February and March, 2016 from Rancho Hidalgo (Animas, New Mexico) with a SBIG STF-8300M on an Astro-Tech AT12RCT at f/8 2432mm.
LRGB - https://www.flickr.com/photos/dcrowson/25804868910/sizes/l
See my refractor image here – http://www.flickr.com/photos/dcrowson/12840913325/sizes/l/.