Astrophotography by Keith B. Quattrocchi

NGC 281
Pac Man Nebula in Cassiopia 
Narrow Band Image

Copyright 2007
Keith B Quattrocchi

         
Image Acquisition Information                      
 
Telescope: 16" RCOS Ritchey-Chretien Telescope (ion milled at f/9) 
Camera: SBIG STL-6303
Guiding: Astrodon MOAG AOG (SBIG 237 with .65 FLR)
Filters: Astrodon Ha, SII, OIII
Mount: Software Bisque Paramount ME
Acquisition Programs:   The Sky,CCDAutopliot III, CCD Soft. 
Processing Programs: CCDStack, Maxim DL, Photoshop
Date:: October 14-October 31, 2007                              
Time: 24x20 min ( 8 hours) each for Ha, SII, OIII: total 24 hrs                           
Processing:  CCD Stack and PhotoShop CS/2
 
Image Information:  The Pac Man Nebula is an emission nebula energized by a nearby open star cluser.  It primarily is an HII emitter.  The dark "Bok" nodules are believed to contain protostars. 
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Additional Comments:  Standard Narrow Band Image using Hubble Palette (SII, Ha, OIII). Color Image assembled in Maxim DL, overlay of Ha and Narrow Band and High Pass filer used in PS CS/2.