| Object: Ngc 6140, spiral galaxy in Draco. Telescope: Luminance: Astrograph 400 f/4 Newton. 3" 1.15x coma corrector up to 1850mm fl. Paramount ME. ASI 6200 MM cmos. Chroma L filter. Color: Astrograph 250 f/4 Newton. Paramount ME. ATIK 16200 ccd. Chroma RGB filters Exposures: L : 212 x 10' ( 35:20 ) R: 110 x 5' ( 9:10 ) G: 110 x 5' ( 9:10 ) B: 110 x 5' ( 9:10 ) Total: 53:50 hours Resolution: 0.42"/pixel. Luminance FWHM after integration: 2.6" (2.4" after deconvolution) Date: January - June 2022 Site: Luminance: 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 (PixInSight): Bias, Dark & Flat calibration Local Normalization DBE Photometric Color Calibration Starnet for star masks Deconvolution Histogram stretching HDRMultiscale Transformation Color saturation adjustments Morphological Transformation stars reduction LocalHistogramEqualization NoiseXTerminator noise reduction Wavelet sharpening |