Copyright © 2011
NGC 3184, a spiral galaxy in the constellation Ursa Major
Distance: 40 million light years
Camera: SBIG ST-2000XM
Telescope: Astrophysics Starfire 140 EDT F7.5
Mount: Astro-Physics Mach1 GTO with Advanced Telescope Systems portable pier
Images: 93 subexposures of 10 minutes each with 31 red, 32 green, and 29 blue for a total of 15 hours
and 20 minutes. No luminance was used for this image.
Date: March 2010
Software: Camera, mount, and guider control - CCD Commander & MaximDL, calibration and stacking - CCDStack, further processing in Photoshop CS4.