Horsehead NGC 7380 Horsehead

(Click on image for Full Resolution)

(Click here for the H-Alpha exposure used in the HaRGB composite)

Date: October 5, 2003
Exposure: HaRGB (3nm) 240:60:60:120
12 x 1200s Ha, 6 X 600s R, G 12 x 600s B
Processing: Captured with CCDSoftV5, MaxIm for Image calibration,(20 flats dark subtracted and Sigma Reject combined, 40 bias frames Sigma Reject combined, 20-1800s darks Sigma Reject combined), dead/hot pixel removal, alignment, normalization. Photoshop with OZONE plugin for final processing and jpg conversion.
Conditions: Clear, Mag 3-4 Skies
Scope: AP155EDF, f/7 (1.671 arcsec/pix measured with TheSky), Vixen 102mm Flourite @ f/9 for Guiding. All equipment on a Paramount ME and can be seen here.
Camera: SBIG ST-8XE, -20°, SBIG ST-237A for Guiding
Comments: Started this one after it crossed the meridian as this is my darkest side. This one fit my FOV almost perfectly so I didn't miss any of the nebula. I was able to add the color 2 weeks later.