Sh2-221 - Nebula in Hydrogen Alpha enhanced colour

Click on the image to see it at 2x resolution

Click HERE for the h-alpha channel

Image Data:

Scope: AP155EDF
Camera: Apogee U16M w Astrodon Gen II H-Alpha
Mount: Paramount ME
40 x 15 minutes H-Alpha for total of 9.5 hours
8 x 10 min each of Red, Green and Blue for total of 6 hours
Flesherton, Ontario, Canada
Sept 12/13 2012
Ambient temp 16C; camera temp -10C; Moon past  full
Images acquired using CCDSoft5
Reduced, Aligned and sigma-reject combined in Maxim
Processed for contrast in PS CS5