Copyright © 2008 Larry Phillips

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M101, Pinwheel Galaxy, NGC 5457 in the constellation Ursa Major

Spiral galaxy.

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.