| Object: Abell 33, planetary nebula in Hydra. Telescopes: OIII: Astrograph 400 f/4 Newton. Paramount ME. ASI 6200. Chroma OIII 3nm filter. Color: Astrograph 250 f/4 Newton. Paramount ME. ATIK 16200. Chroma RGB filters. Exposures: Oiii: 53 x 20' ( 17:40 ) R: 30 x 10' ( 5:00 ) G: 30 x 10' ( 5:00 ) B: 30 x 10' ( 5:00 ) TOTAL: 32:40 hours Resolution: 0.54"/pixel. FWHM after integration: OIII 2.4" Date: January - March 2021 Sites: 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, Darks & Flat calibration DBE Photometric Color Calibration Histogram & Curves adjustments Starnet for star masks Noise reduction: ACDNR Software: PixInSight |