Object: ..... NGC 6888 (Crescent Nebula) false color Ha+OIII
Date: ..... 21.08.2009
Mount: ..... Losmandy G11 on Berlebach Uni-4c
Optics: ..... SV105, 105mm f7 Triplet Apochromatic Refractor Telescope
Filters: ..... Astronomik 12nm Ha + OIII CCD
Camera: ..... Sigma 402, prime focus
Air temperature: .... 26°C
Chip temperature: .... -10°C (regulated)
Exposure: ..... Ha: 11x300s, OIII: 10x300s
Binning: always 1x1
Processing: ..... Stacking (Lights, Darks, Bias), DDP, Noise Reduction, etc. with ImagesPlus 3.5, Deconvolution and Trichromy with Astroart 4.0
R/G/B=Ha/OIII/OIII
Guiding: ..... Autoguiding with Skywatcher ED 80/600, Meade DSI Pro and GPUSB/PHD
090821_crescent-nebula_hoo
345 KB768512
