| Object: Sh2-188 planetary nebula in Cassiopeia 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. Exposures: Ha : 156 x 15' (39:00 ) Oiii: 20 x 15' ( 5:00 ) Resolution: 0.44"/pixel (drizzle resampled) Guiding: Moravian G0 on Off-Axis Guider Date: September - 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 (L, R: Halpha - G,B: Oiii) Software: PixInSight |