Arp 331 (the Pisces Cloud) is in the class of Galaxy Chains and includes NGC 379 – 380 and 382 – 388. See the annotated version.
Luminance – 24x600s – 240 minutes – binned 1x1
RGB – 8x300s – 40 minutes each – binned 2x2
360 minutes total exposure – 6 hours
Imaged December 1st, 17th, 23rd and 25th , 2016 from Dark Sky New Mexico at 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/33292494333/sizes/l
LRGB annotated - https://www.flickr.com/photos/dcrowson/33973744091/sizes/l