NGC 4228 (NGC 4214, UGC 7278 and others) is a dwarf barred irregular / starburst galaxy located approximately 10 million light-years away in Canes Venatici. While similar to the Small Magellanic Cloud, is it brother larger and brighter.
NGC 4190 (UGC 7232 and others) is another irregular galaxy above and to the right (west) of NGC 4228. It is located approximately 22 million light-years away.
NGC 4163 (NGC 4167, UGC 7199 and others) is yet another irregular galaxy to the right (west) of NGC 4228.
UGCA 276 is the small, faint smudge just below and to the right of NCG 4228. It appears to be another irregular (dwarf spheroidal?) galaxy.
This field also contains 163 identified quasars. While taken from the city, 21st magnitude QSOs appear to be visible in the image.
Luminance – 36x600s – 360 minutes – binned 1x1
RGB – 16x300s – 80 minutes each – binned 2x2
600 minutes total exposure – 10 hours
Imaged from Dardenne Prairie, Missouri (a red zone) on February 18th and 25th, 2017 with a SBIG ST-8300M on an Astro-Tech AT90DT at f/6.7 603mm
LRGB - https://www.flickr.com/photos/dcrowson/33287033810/sizes/l
I had some strange issues that wouldn’t calibrate out with my exposures from the first night. I shot the exposures the second night and ran into the same issue. At this point I figured out that it was some kind of reflection with my flats. This is the reason for ten hours of data since everything cleaned up with the new flats.