NGC 3031 (M81) UMa 25

February 22, 2007

This is a combination of 30 images, each of 30 seconds The images were taken with a ST-402ME attached to an Nikon 64.29mm F/2.8 camera lens (focal length = 180mm). Each of the images was corrected with a dark frame and a flat field.

The lens/ST-402ME combinatino was attached piggyback to a Meade 5" refractor. There was no guiding during the exposure

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Last updated: February 23, 2007