Howard's Astronomical Adventures
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M101 : Pinwheel Galaxy in Ursa Major

Photograph of M101

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.

Click image for larger version (1440 x 884, 385kb).

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

Photograph Information
Date05.11.2007 and 05.12.2007
LocationFlint Hills of Kansas
TelescopeAP130 @ f6 w/field flattener
CameraCanon 350D, Hutech modified type I
ExposureStack of 35, 9 minute exposures at ISO 800
Notes66°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

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