Arp 220 (
IC 4553, UGC 9913, PGC 55497, VV 540 and many others) is the result of the merger of a couple of galaxies approximately 253 million light-years away in Serpens Caput. Part of his “Galaxies with Adjacent Loops” class, Arp would not have known that two cores 0.9” apart (
http://articles.adsabs.harvard.edu/cgi- ... etype=.pdf) are visible in future radio and IR observations.
Luminance – 24x600s – 240 minutes – binned 1x1
RGB – 12:13:8x300s – 60:65:40 minutes each – binned 2x2
405 minutes total exposure – 6 hours 45 minutes
Imaged over eight nights in June, 2019 and February and April, 2021 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/ ... 2/sizes/l/
Dan
