NGC 4145 (PGC 38693, UGC 7154 and others) is the barred spiral at the top center of the image. It is located approximately 68 million light-years away in Canes Venatici.
NGC 4151 (PGC 38739, UGC 7166 and others) is the odd-shaped (almost like Saturn) Seyfert 1 galaxy at the bottom center. Faint arms can be seen in this image. Deeper images show them extending out to the small spiral NGC 4156. NGC 4151 is located approximately 63 million light-years away.
This field of view is filled with quasars. Aladin identifies 128. I’m surprised that my refractor image from the city managed to get down to around 20th magnitude.
Luminance – 18x600s – 180 minutes – binned 1x1
RGB – 8x300s – 40 minutes each – binned 2x2
300 minutes total exposure – 5 hours
Imaged from Dardenne Prairie, Missouri (a red zone) on March 13th, 2018 with a SBIG ST-8300M on an Astro-Tech AT90DT at f/6.7 603mm.
LRGB - https://www.flickr.com/photos/dcrowson/41744845412/sizes/l
Shortly after this image was taken, a supernova was found in NGC 4151. My image of this one can be found here - https://www.flickr.com/photos/dcrowson/26371096217/sizes/l.