Arp 145 (UGC 1840, PGC 9062 and others) is the result of a head on collision of elliptical and spiral galaxies. This one is in Arp’s “E and E-like galaxies – Material emanating from E galaxies” class. It is located about a degree from NGC 891 and approximately 258 million light-years away in Andromeda.
Luminance – 24x600s – 240 minutes – binned 1x1
RGB – 8x300s – 40 minutes each – binned 2x2
360 minutes total exposure – 6 hours
Imaged December 8th, 11th and 14th, 2020 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/51133575500/sizes/l/