Astrophotography by Keith B. Quattrocch

NGC 5457
 Spiral Galaxy in Ursa Major 
LRGB Image 

Copyright 2018 
Keith B Quattrocchi

Image Acquisition Information  
                    
Telescope: 16" RCOS Richey Chretien Telescope (ion milled at f/9) 
Camera: SBIG STL-6303
Guiding: BIG AOL
Filters: Astrodon LRBG Filters
Acquisition Programs: The SkyX, CCDAutopilot 5, FocusMax 
Processing Programs: CCDStack, Photoshop CS4.
Date: Data processed October 18, 2018.  Data aquisition: April 2, 2018-April 22, 2018                              
Time:  12 x20 min 4 hours) for each of L,R,G,B and Ha for a total of 20 hours.                              
Processing:  CCD Stack and PhotoShop CS/4

Image Information: NGC 5457 is a spiral galaxy in Ursa Major.

Processing Infornmation  This LRGB images were obtained using  AstroDon filters.  The LRGB and Ha images were assembled in CCDStack.  The assembled image and a Luminence were recombined in Photoshop.  Further stretching, high pass filtering and background smoothing was performed with Adobe Photoshop CS/4.  All data stretching was by without DDP CCD Stack and then further stretching .