Combination of 10, 3 minute exposures unfiltered.
SBIG STL-1001E CCD. 20" f/6.8 Dall-Kirkham cassegrain telescope at prime focus.
NGC 3842 is the brightest galaxy in a moderately large group of galaxies in Leo Minor labelled Abell 1367. At magnitude 11.8, NGC 3161 is readily visible as a spherical nebulous patch in an 8" telescope. There are numerous magnitude 14, 15, and fainter galaxies in the vicinity so there are plenty of good challenges for both medium and large telescopes.
Discovered by William Herschel, NGC 3842 contains one of the most massive black holes yet discovered, almost 10 billion solar masses!