Horsehead NGC1977 Horsehead

(Click on image for Full Resolution)

Date: October 22, 2003
Exposure: RGB : 3600:3600:3600
4 X 900s R,G,B
Processing: CCDSoftV5 for image acquisition, MaxIm for RGB combine, image calibration: 20 flats each R,G,B, dark subtracted and median combined, 30 bias frames median combined, 16-1800s darks median combined, alignment, normalization, and color combining. Photoshop for final balance and web conversion. The light pollution was worse on the green set as always, and this was an experiment to try and overcome it. The RGB exposures were done with the humidity pegged on 100%.
Conditions: Average, Mag 3-4 Skies, clear, but the usual 100% humidity after midnight.
Scope: AP 155 EDF @ F/7 on a Paramount ME
Camera: SBIG ST-8XE/CFW-8A, -20°
Comments: This was taken as an experiment to see if longer exposures would help with the light pollution, and help capture a bit more of the faint nebulosity. Using a NABG camera, I have usually tried to hold down the blooming by taking shorter exposures. Blooming was pretty bad on all the frames, and the anti-blooming software can only do so much, but except for those areas, the rest of the image did show improvement.