NGC7635, The Bubble Nebula in Cassiopeia

 

(Click on image for full size version)

 

Description: This emission/reflection nebula is in the vicinity of M52.
 
Exposure Data: 10/13/2003.  RRGB: 8x8m, 6x5m, 6x5m.  GB 2x2. -10C, 1.1 arc-sec./pixel.
 
Processing: Acquired via Sequencer II (dither 4) and CCDSoft, reduced and aligned, in Mira, Combined in Sigma, L 2x CCDSharp, RGB combine in Maxim, LRGB combine, curves, levels and other processing in Photoshop.
 
Optical System: BRC-250, 10 Baker-Ritchey-Chretien @ F/5, ST-10XME NABG/CFW-8A CCD camera, Paramount ME.  autoguided
 
Comments: Average FWHM was 4.0 arc-sec., deconvolved to 3.0 arc-sec.   See here for a close-up of the bubble region.