NGC7635, The Bubble Nebula in Cassiopeia




Description: This emission/reflection nebula is in the vicinity of M52.
Exposure Data: 9/24/2009.  HaRGB: 12x20m, 4x20m, 4x20m, 4x20m,all 1x1. -50C, 0.50 arc-sec./pixel.  8 hours total exposure.
Processing: Acquired via CCDAutoPilot and Maxim/CCDSoft, calibrated and combined in CCDStack, final processing in PS CS3 and PixInsight.
Optical System: 0.4m Ritchey-Chretien @ F/9 w/FFC, Apogee Alta U16M/D9F CCD camera/FW50-7S filter wheel, AstroDon Gen 2 filters, Paramount ME, dithered 3 pixels, off-axis guided with SBIG ST-402ME.
Comments: Synthetic RGB from R+75%Ha, G, B+15% Ha.