| Object: Ngc 6826, planetary nebula in Cygnus. Telescopes: H-alpha, OIII: Astrograph 400 f/4 Newton. Paramount ME. ASI 6200. Chroma Ha 5nm & OIII 3nm filters. Color: Astrograph 250 f/4 Newton. Paramount ME. ATIK 16200. Chroma RGB filters. Exposures: H-a: 8 x 5' ( 00:40 ) Oiii: 339 x 5' ( 28:15 ) R: 12 x 5' ( 1:00 ) G: 12 x 5' ( 1:00 ) B: 12 x 5' ( 1:00 ) TOTAL: 31:55 hours Resolution: 0.42"/pixel. FWHM after integration: Oiii 1.9" Date: July - August 2021 Sites: H-alpha, OIII: Sagan Observatory Las Rozas (Spain) - mag 4.5 suburban skies - Color: La Sagra Observatory Puebla de Don Fadrique (Spain) - mag 7 professional observatory skies - |
Processing: Bias, Dark & Flat calibration DBE Color calibration MLT linear noise reduction Histogram (NB) & Arcsinh (RGB) stretching Starnet for star masks Color saturation adjustments ACDNR noise reduction MorphologicalTransformation stars reduction Wavelet sharpening Software: PixInSight |