The Antennae Galaxies NGC4038 and NGC4039 (Arp 244) in Corvus.
This image is a stack of 6 eight minute exposures using an SBIG STL11000M CCD camera on a TEC 200FL 8" f/8 refractor
for the luminance channel, with stacks of 3 eight minute exposures each for the red, green and blue channels.
The image was calibrated, defect-corrected, stacked and gammalog-stretched using AIP4WIN V2.3.0.
This view is a crop from the full 4008 x 2672 frame. Clicking on it will show the whole frame,
which also includes NGC4027 and a whole host of other small galaxies.