21  July  2017
 
M51 LRGB
   
   

                                                                                                               
   
By Rodd Dryfoos

C11 Edge at f=1960 mm (.7x reducer)
 SBIG STT 8300, Astrodon Filters--About 18 hours
 Lum: 37 x 10min
 Red: 30 x 10min
 Green: 21 x 10min
 Blue: 22 x 10min
 Processed on Pixinsight



 

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