AMATEUR ASTRONOMY  home                                                                       
Abell 61
(click on the image for the highest resolution)

            


 
Object:             Abell 61,  planetary nebula in Cygnus
Telescope:      
Astrograph 400 f/4 Newton  (APM 1.5x multiplier/corrector up to 2440mm fl). Paramount ME.
Camera:           Artemis ART4021.   Astronomik LRGB filters.
Exposures: Halpha :    39 x 15'   (  9:45 ) 
                         Oiii :  132 x 15'   (33:00 )
                             R:   15 x 10'   (  2:30 ) 
                             G:   15 x 10'   (  2:30 ) 
                             B:   15 x 10'   (  2:30 )  
Resolution:       0.39"/pixel  (drizzle resampled).   Oiii FWHM after integration: 2.6" 
Guiding:            Moravian G0 on Off-Axis Guider
Date:                 March - August  2019
Site:                  Sagan Observatory  Las Rozas  (Spain)     - mag 4.5 suburban skies -
Processing:
Bias, Darks & Flat calibration
Drizzle integration
DBE
Histogram & Curves adjustments
HDRMT
LRGB combining - L(Ha,Oiii)  nebula color (Ha,Oiii),  stars color (RGB)
Noise reduction: ACDNR

Software:
PixInSight