Arp 1 (NGC 2857, UGC 5000 and others) is a grand design face-on spiral located approximately 238 million light-years away in Ursa Major. This one is part of Arp’s ‘Low Surface Brightness’ class.
Arp 285 consists of the two distorted spirals with tidal tails. The top galaxy is NGC 2856 (UGC 4997 and others) and the bottom is NGC 2854 (UGC 4995 and others). These are found in Arp’s ‘Double Galaxies – Infall and Attraction’ class.
Luminance – 24x600s – 240 minutes – binned 1x1
RGB – 8x300s – 40 minutes each – binned 2x2
360 minutes total exposure – 6 hours
Imaged April 26th, 27th and 28th, 2019 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/47953213401/sizes/l