Pinwheel Galaxy, M101
My 1st image of this galaxy
Copyright © 2011
M101, Pinwheel Galaxy, NGC 5457 in the constellation Ursa Major
Distance: 27 million light years.
Size: 170,000 light years across
Camera: SBIG ST-2000XM
Telescope: Astrophysics Starfire 140 EDT F7.5
Mount: Astro-Physics Mach1 GTO with Advanced Telescope Systems portable pier
Images: 12 luminance (clear) sub images @ 5 minutes each for a total exposure time of 1 hour.
Date: April 12, 2008
Software: Camera and guider control - MaximDL, calibration and stacking - CCDStack,
further processing in Photoshop CS2.