| Object: Ngc 40, planetary nebula in Cepheus Telescope: Astrograph 400 f/4 Newton (APM 1.5x multiplier/corrector up to 2440mm fl). Paramount ME. Camera: Artemis ART4021. Baader H-alpha & Oiii filters. Astronomik RGB filters. Exposures: Ha : 79 x 15' (19:45 ) R: 10 x 10' ( 1:40 ) G: 10 x 10' ( 1:40 ) B: 10 x 10' ( 1:40 ) Resolution: 0.42"/pixel (drizzle resampled) Guiding: Moravian G0 on Off-Axis Guider Date: December 2017 - October 2018 Site: Sagan Observatory Las Rozas (Spain) - mag 4.5 suburban skies - |
Processing (simplified): Bias, Darks & Flat calibration Drizzle integration Deconvolution Histogram & Curves adjustments HDRMT LRGB combining (nebula:Halpha; stars:RGB) Software: PixInSight |