Celestial hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  Bode's galaxy  ·  Bode's nebulae  ·  Cigar galaxy  ·  M 81  ·  M 82  ·  NGC 3031  ·  NGC 3034
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M81 and 82, KHartnett
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M81 and 82

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M81 and 82, KHartnett
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M81 and 82

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Description

Subexposures from the nights of 2-17-17 and 2-26-17 were processed together. Most of the subs were 180s long, but my (incomplete) notes seem to indicate that I also added about a dozen subs that were 160s long. My guess is that I had made a mistake setting the exposure length in BackyardEOS and didn't notice it right away. Anyway, I dithered the mount every four subexposures and though I took flats, I didn't like the way my stacked image came out when I used them in DSS, so processed again without them - just using darks and bias frames.

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M81 and 82, KHartnett