Here’s my latest image of the Bubble and Lobster Claw nebula region in Cassiopeia. This was taken over many nights in October and early November.
The Bubble Nebula is an emission nebula in the constellation Cassiopeia and lies some 11000 light years away. The bubble is 10 light years in diameter and is formed by the strong stellar wind of a large hot star at the 11 o’clock position in the bubble. This wind is causing the bubble to expand at roughly 6 million miles per hour. This star is 2 million years old and will likely go supernova within 10-20 million years. Surrounding the bubble are expansive molecular clouds that are also excited by the hot central star. The Lobster Claw Nebula is around the same distance as the Bubble and is divided into H-II (gold/green) and OIII (blue) regions of emission. The brightest portion of the OIII region outline the claws of the lobster. Throughout the frame are other patches of emission, including sh2-158, sh2-159, sh2-161, sh2-163 and IC1470.
Scope: Astro-Physics 92mm Stowaway @f/5.3
Reducer: Astro-Physics 0.8x telecompressor
Camera: ASI6200MM Pro
Guide Camera: ASI174MM Mini
Mount: Mach1 GTO
OIII: 18x5min total
Software: Voyager, PHD2, APCC, Pixinsight
12.3 hrs total exposure
Astrobin for high-res and more details: