Horsehead Nebula, B33 in IC 434
Copyright 2011
Larry Phillips
Horsehead Nebula (B33) in the constellation Orion using only a narrowband Ha filter. Compare this image to the one taken in Ha light only. The nebula in the lower left is NGC 2023 and the nebulosity behind the horsehead is IC 434

Distance: 1500 light years.
Size: N/A
Camera: SBIG ST-2000XM
Telescope: Astrophysics Starfire 140 EDT F7.5
Mount: Astro-Physics Mach1 GTO with Advanced Telescope Systems portable pier
Images: Exposure was 40 sub images @ 10 minutes of 10 clear, 10 red, 10 green, and 10 blue for a total
                 exposure time of 6 hours and 40 minutes.
Date: March 2009
Software: Camera, mount, and guider control - CCD Commander & MaximDL, calibration and stacking - CCDStack, further processing in Photoshop CS4.