Imaged from Dardenne Prairie, Missouri (a red zone) on April 28th and May 1st, 2016 with a SBIG ST-8300M on an Astro-Tech AT90DT at f/6.7 603mm.
LRGB – https://www.flickr.com/photos/dcrowson/26506537760/sizes/l
M87 (NGC 4486, Arp 152 and others) is the elliptical galaxy at the bottom right.
M89 (NGC 4552 and others) is the elliptical galaxy near the bottom left. It is above non-interacting galaxies NGC 4551 (elliptical) and NGC 4550 (lenticular).
M90 (NGC 4569, Arp 76 and others) is the nice spiral at the top left.
Luminance â€“ 12x600s â€“ 120 minutes â€“ binned 1×1
RGB â€“ 8x300s â€“ 40 minutes each â€“ binned 2×2
240 minutes total exposure â€“ 4 hours