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|PHOTO OF THE WEEK|
M101 lies at a distance of about 15 million light years.
It is about 90,000 light years across, somewhat smaller than our Milky Way galaxy.
This image was taken with the 10" telescope and MX716 camera.
The luminence frame for the image is a stack of 4 x 20 min exposures. The color frames were single 20 min exposures binned 2 x 2 and resampled.
This image was processed with AIP software and is a composite of two images. One processed by Al Kelly and one by me
His seemed a bit too red to me and mine was too blue so I combined them into something in between.
The luminence frame for the image is a stack of 5 x 10 min exposures. The color frames were single 10 min exposures binned 2 x 2 and resampled.
As a comparison of interest, this color image was taken last year with the MX7C one shot color camera.
It was a single 20 minute exposure.
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