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M 81 is a spiral galaxy approx. 12 million light years from Earth and spans approximately 22,000 light years. It is locked in a gravitational tug-of-war with M82.

Image acquired using SBIG St-10XME camera with Astrodon filter set through 10” Astro-Tech AT10RC telescope.

120 minutes of Luminance, 1x1 Binning.

70 minutes each of Red, Green and Blue, 1x1 Binning.

Five minute sub-frames.


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