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ngc 6888 - Crescent nebula


            


 
Object:             Ngc 6888, the Crescent Nebula in Cygnus.
Telescope:      
Astrograph 400 f/4 Newton  (3" 1.15x coma corrector up to 1850mm fl). Paramount ME.
Camera:           Artemis ART4021.   Astronomik LRGB filters.
Exposures: Halpha : 148 x 15'     (37:00 ) 
                         Oiii : 151 x 15'     (37:45 )
                       RGB:   16 x   3'     (  0:48 )  each filter
Resolution:       0.82"/pixel .   H-alpha FWHM after integration: 2.5" 
Guiding:            Moravian G0 on Off-Axis Guider
Date:                 August - December  2019
Site:                  Sagan Observatory  Las Rozas  (Spain)     - mag 4.5 suburban skies -
Processing:
Bias, Darks & Flat calibration
DBE
Deconvolution
Histogram & Curves adjustments
HDRMT
LRGB combining - L(Ha,Oiii)  nebula color (Ha,Oiii),  stars color (RGB)
Noise reduction: ACDNR

Software:
PixInSight