LBN 576 (also known as Abell 85 and CTB 1) is a faint supernova remnant lying almost 10,000 light years away. Coincidentally, it is also around 10,000 years old. Until recently it was thought to be a planetary nebula but recent studies confirm it to be a supernova remnant, the closest one known to Earth. Supernova remnants result from the explosion of a star in a supernova and are bounded by an expanding shock wave. They consist of ejected material expanding from that explosion.
Credit & Copyright: Burley Packwood
I'm not sure why the huge difference in posted images versus mine except that maybe more RGB data would be beneficial. I have noted that most of the other images I have seen that show a good deal more nebula detail are taken with wide field refractors and thus likely to be a faster optic netting more detail in less time. For now the project will continue in RGB data collection.