M101 : Pinwheel Galaxy in Ursa Major

Resembling a pinwheel this large galaxy is found in the constellation Ursa Major, the Big Dipper. The photograph is the nearly the full field of view of my telescope at f6 with the 350D camera.

Additional information about this object can be found on the SEDS website

Photograph Information
Date	05.11.2007 and 05.12.2007
Location	Flint Hills of Kansas
Telescope	AP130 @ f6 w/field flattener
Camera	Canon 350D, Hutech modified type I
Exposure	Stack of 35, 9 minute exposures at ISO 800
Notes	66°F, 87%rh, average to good transparancy. Calibrated with bias, dark and flat frames. Initial RAW conversion, registration and stacking in IRIS. Noise reduction in PixInsight LE 1.02 Additional adjustments in Photoshop CS2