A Matt Oltersdorf CCD image
Pinwheel Galaxy / M 101 - Spiral Galaxy, type Sc
Constellation: Ursa Major
Mag: 7.9
180 sec. exposure, clear filter, binning = 1
image reduced with flat and dark frames, flipped horizontally

Telescope used: Takahashi Mewlon 300

CCD used: FLI Dream Machine 1024 x 1024 pixels.

FOV: 23.6 x 23.6 Arc minutes
Resolution: 1.38 Arc Seconds per pixel

Location of Observatory:
Lat: N31d 55m 42s    Long: W110d 04' 24"
15 miles north of Tombstone, Arizona
December 2002