Thor's Helmet (NGC 2359) Narrow Band
Location: Banglamung, Thailand (100 59 E, 12 55 N)
Date: 13, 17, 18 and 19 Dec, 2011
Camera: QHY-9 and Baader narrow band filters
Telescope: William Optics FLT110
Frames: Eleven Ha and fifteen OIII 20 minute exposures with RGB data added for star colour.
Processing: Stacked in CCDStack (Synethic green from Ha and OIII), curves, levels, sharpened and noise
reduction in Photoshop CS5.