| Object: Abell
84, planetary nebula in Cassiopeia. 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: 165 x 20' ( 55:00 ) Oiii: 25 x 20' ( 8:20 ) R: 12 x 5' ( 1:00 ) G: 12 x 5' ( 1:00 ) B: 12 x 5' ( 1:00 ) TOTAL: 66:20 hours Resolution: 0.42"/pixel. FWHM after integration: Ha 1.95" Date: August - October 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 Photometric 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 |