NGC 7635 The Bubble Nebula

Another interesting object is NGC7635 also known as the Bubble Nebula in the constellation of Cassiopeia.

It’s the result of massive stars in the region that create fast-moving gas which spreads out from the star BD +60° 2522. Pushing surrounding sparse gas into a shell. The energetic starlight then ionizes the shell, causing it to glow.

The image data for this was obtained over 2 different clear nights and from 2 different locations, our family cottage on the shore of Lake Huron and the dark site between Conestoga Lake and Listowel, Ontario.

It’s a total of 4 hours obtained with a Canon 350xt DSLR and an Equinox 80mm ED APO refractor with a 0.8x reducer/field flattener.
Image details:

Equipment:  Skywatch Equinox 80mm ED APO refractor, William-Optics 0.8x FF/RR, Canon (modified) 350XT DSLR. 400mm FL

Software: Nebulosity 3 for acquisition, calibration and alignment. PHD for auto guiding.

Exposure: Total of 4 hours / 5min subs.

Processed in Photoshop.