This is a combination of 6 images, each of 480 seconds The images were taken with a Pictor 1616 attached to an Meade 10" F/6.3 telescope. A Pictor 201XT was attached to an ETX for guiding. Each of the images was corrected with a dark frame and a flat field.
My co-observer/imager, Greg Pearce, observed this in his 20" Obsession and wanted to get a CCD image of it. The the dark lane was a surprise since he did not observe it visually.
Click here for the full resolution image