Selected for the Cover of Sky and Telescope's 2009 Beautiful Universe
Image taken with 3 nm Astrodon OIII, H-a and SII narrowband filters. Star color was added with Astrodon Generation 2 RGB filters. Data taken automatically with CCDAutoPilot4, calibrated in CCDStack and processed in Photoshop CS3. The Hubble palette was used for color mapping
[OIII] = blue, H-a = Green, SII = Red
Technical Details
Exposure Time:
14.5 hrs Total, 5 hrs OIII and SII, 4 hrs H-a, 12 min each R,G,B
DG Imaging 
