Combination of 100, 3 minute exposures unfiltered.
SBIG ST-9XE CCD. 12" f/10 Schmidt-cassegrain telescope with an f/6.3 focal reducer.
PGC 40004 is a fairly small and faint galaxy in Virgo. With a catalogue magnitude is 15.8, this object would make an interesting challenge for visual observers with very large telescopes.