This image is a mosaic containing the 4 members of ARP 316 (Hickson group 44) - namely NGC 3193, the eliptical galaxy in the upper right, NGC 3190, the nearly edge on spiral with prominent dust lane, NGC 3187 below it distorted into a pair of tails by tidal interactions and NGC 3185, the small spiral on the left.
Details
20" f/4.1 telescope at the SDG observatory of Garry Sedun in Arizona.
TV Paracorr coma corrector and SBIG ST2000 XM camera.
Guidescope WO 80mm f/6.8 APO.
Mount - Paramount ME
Exposures -
Set 1
B- used 9 of 12- 4m exposures = 36m
Clr- used 11 of 20- 4m exposures = 44m
G- used 13 of 15- 4m exposures = 52m
R- used 10 of 15 4m exposures = 40m
Set 2
5x300s on each filter (25m each)
plus flats, bias and darks to match.
Total exposure time 4.53h.

Processed in Images Plus and Photoshop