C49, Dumbell Nebula
Imaging: TS80 apo, ZWO ASI533 (gain 100), L-Enhance
Subs: 374x120s (12h), darks, flats, and darkflats
Software: NINA, Phd2, PixInsight
(Additional notes below)
This is the Messier 27 DSO or Dumbell Nebula. It is sometimes also called the "Apple Core" nebula. I took the images for this over 4 nights starting in late July. This is one of the smaller nebulas I have imaged so this picture is cropped (i.e. digitally zoomed).
The Dumbell Nebula is a "planetary" nebula, a misnomer since these have nothing to do with planets. Rather, it is a form of emission nebula which has a expanding, glowing shell of ionized gas ejected from a red giant star late in its life (Wikipedia). The center star is now a white dwarf. This nebula is about 1360ly from us (within our Milky Way like all the nebula we photograph). It is often passed over since it is so much smaller than some other magnificent structures that become visible at the same time. Nevertheless, it is an important structure being the first of its type identified by Messier.