Description:

NGC 7635, also called the Bubble Nebula, is an emission nebula in the constellation Cassiopeia.  It is positioned close to the open cluster M52.  The "bubble" is created by the stellar wind from a massive hot 8.7 magnitude young central star.

Even with my 20" scope in dark skies, visually this is a very challenging object. 

Photographic Details:

Date & Location: October 16th, 2009, Fort Mckavett, Texas.
Scope: Obsession 20” f/5 on a Tom Osypowski Dual Axis Equatorial Platform, Orion 100mm f/6 Guidescope.
Autoguider: Orion Starshoot Autoguider and PHD Guider software.
Camera: Canon XS DSLR (self-modified), Canon's own capture software.
Filters: None
Conditions: Temp 55F, Humidity 82%, Winds calm, Transparency 8/10, Seeing 7/10.
Exposures: 16 x 120sec @ 1600 ISO Sub Frames, 9 Darks average combined for master dark.
Post-processing: 3904x2900 Raw files converted to Lossless 16-bit FITS, calibrated, aligned, and combined with ImagePlus 3.75. Final processing Adobe Photoshop CS.