Hickson Compact Group 2 consists of:
UGC 312 (UGC 312 E, PGC 1921, HCG 2a and others) – the odd spiral left (east) of center
Mrk 552 (UGC 312 W, PGC 1914, HCG 2b and others) – the spiral to the right (west) of UGC 312
UGC 314 (PGC 1927, HCG 2c and others) – the spiral below UGC 312
UGC 315 (PGC 1934, HCG 2d and others) – the spiral to the left of UGC 314
All of these are located in Pisces.
Luminance – 24x600s – 240 minutes – binned 1x1
RGB – 8x300s – 40 minutes each – binned 2x2
360 minutes total exposure – 6 hours
Imaged December 20th, 21st and 27th, 2019 and January 13th, 20202nd, 20th and 29th, 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/49405188188/sizes/l/