Horsehead NGC4244 Horsehead

(Click on image for Full Resolution)

Date: Mar - Apr 2009
Exposure: LRGB - 690m : 300m : 375m : 360m
38 x 900s L & 12 x 600s L, 20 x 900s R, 25 x 900s G, 24 x 900s B
Processing: CCDAutoPilot4 used to collect data. CCDSoft for image acquisition, CCDStack on a x64 Vista machine for Image calibration, Astrodon LRGB filters (40 flats each L,R,G,B, Bias subtracted and Sigma Clip combined, 65 bias frames Sigma Clip combined, 25 x 900s darks, Sigma Clip combined), alignment, normalization, FITS master files creation, and RGB raw TIFF creation. Photoshop CS2 for final LRGB processing, final layers adjustment and jpg conversion for the website.
Conditions: Fair, Mag 5-6 Skies
Scope: RCOS 10" Astrograph
Camera: SBIG ST-10XME, -20°
Comments: NGC 4244 is a spiral galaxy that is estimated to be between 4-8 million light years away It is located in the constellation Canes Venatici. Taken over a number of nights with variable seeing conditions.