Horsehead NGC2403 Horsehead

(Click on image for Full Resolution)

Date: November 28, 2003
Exposure: HaLRGB(min) : 300:120:90:90:105
10 x 1800s Ha, 12 x 600s L, 6 X 900s R,G & 7 x 900s B
Processing: CCDSoftV5 for image acquisition, MaxIm for RGB combine, image calibration: 20 flats each L,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 very bad on the green and red sets. I been working on a photoshop method that seem to help the light pollution and improvr the final image. More images to test on will determine if this works for all my problems. Time will tell. The RGB exposures were done over 2 night of low humidity but bad seeing.
Conditions: Above average, Mag 4-4.5 Skies, very clear, but unusual 17% humidity for most of the night.
Scope: AP 155 EDF @ F/7 on a Paramount ME
Camera: SBIG ST-8XE/CFW-8A, -25°
Comments: The Ha image was combined with the R image and this composite was used as the "2nd" luminance image and this brought out the HII regions better. Not even binning would have helped this bad seeing period. I am starting to think that the humidity isn't all that bad, as it does steady the seeing a bit.