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About this Image
The well known Horsehead Nebula (Barnard 33) is the dark globule near the center of this image.
It is obscuring the modestly bright, extended nebula IC 434, which extends south of the bright star Zeta Orionis (one of Orion's belt stars).
Note that the Horsehead is just an extrusion of a large dark nebula covering about the left half of this image, and thus extincting the light of most of the stars from behind.
105mm TMB refractor with flattener at f/6.5
|Camera||SBIG STL-11000M at -30C, internal filter wheel|
|Date||Nov 22, 2004.|
|Sky Conditions||mag 5.5, good transparency, temperature 0 C,|
|Exposure||LRGB= 30:30:30:30 min (all 10-minute sub-exposures)|
Image aquisition in Maxim DL 4.0; Image calibration, aligning, mean stacking, DDP and color synthesis in ImagesPlus;
Photoshop: L channel added at 50%; cropped; color balance