Object: ..... IC5146 - The Cocoon Nebula - Narrowband false colour
Date: ..... 30.08.2011
Mount: ..... Losmandy G11 on Berlebach Uni-4c
Optics: ..... Celestron C11, 280mm Schmidt Cassegrain Telescope @ f2 (with Hyperstar3 lens asembly)
Filters: ..... Astronomik 12nm Ha and OIII CCD
Camera: ..... Sigma3200 with TS Filter Drawer
Chip temperature: .... -15°C regulated
Exposure: ..... Ha: 29x120s, OIII: 24x180s
Binning: 1x1
Processing: ..... Stacking (Lights, Bias, Darks, Flats), DDP, bloom removal, colour synthesis (R/G/B=Ha/OIII/OIII) and balance, sharpening; all with Imagesplus 4.25
Guiding: ..... Autoguiding with modified 8x50 finder scope, Meade DSI Pro and GPUSB/PHD
Comments: medium seeing, poor transparency, no Moon
110830_ic5146_cocoon-nebula
622 KB1024667
