The constellation Cassiopeia holds a wealth of interesting imaging content. One of my favorite targets is the Bubble Nebula, NGC 7635, which is an emission nebula produced by the effects of radiation and stellar winds from a Wolf-Rayet star (designated BD+60°2522) on the H-II region around it. In the images below, that star appears in the lower left quadrant of the bubble. In the same part of the sky, one finds the open cluster M52, the smaller emission nebula NGC 7538, and the tiny bright feature within Sh 2-157 – a large but faint H-II cloud called the Lobster Claw.
The image at the bottom of this page shows the entire region where these objects are found. That image is the composite of 77, 6-minute frames (7h 42m) captured 9/29/22 & 9/30/22 at ISO 3200 through the 130mm astrograph fitted with a 4-band, narrowband filter that is ideal for nebula type targets.
I’ve purchased new picture processing software that does a nice job of noise removal and is pretty much moron proof – a great benefit for me. I think I’ll go back to some of my earlier posts and tweak those images to improve them.
