Sh2-157 - Nebula in Hydrogen Alpha

Click on the image to see it at 2x resolution

Click HERE to see the h-alpha channel.

Image Data:

Scope: AP155EDF
Camera: Apogee U16M w Astrodon Gen II Filters
Mount: Paramount ME
35 x 15 minutes H-Alpha
Approx 1 hour each of RGB binned 2x2
Flesherton, Ontario, Canada
Sept-Oct  2012
Ambient temp 6C; camera temp -10C; Moon approaching full
Images acquired using CCDSoft5
Reduced, Aligned and sigma-reject combined in Maxim
Processed for contrast in PS CS5