Abell 2052, a galaxy cluster in Serpens.
This image is a stack of 8 eight minute exposures
using an SXV-H9 CCD camera on a Vixen R200SS 8" f/4 Newtonian equipped with a Paracorr.
The diagonal line through the image is a satellite trail.
The exposures were calibrated, defect-corrected and stacked using AIP4WIN.
This image has been resampled down from its original size of 1062x1024.