| 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 |