Celestial hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  M 101  ·  NGC 5449  ·  NGC 5451  ·  NGC 5453  ·  NGC 5455  ·  NGC 5457  ·  NGC 5461  ·  NGC 5462  ·  Pinwheel galaxy
Center of the Pinwheel M101 with 140mm APO, Jonathan Young
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Center of the Pinwheel M101 with 140mm APO

Center of the Pinwheel M101 with 140mm APO, Jonathan Young
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Center of the Pinwheel M101 with 140mm APO

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Description

The Pinwheel Galaxy (also known as Messier 101, M101 or NGC 5457) is a face-on spiral galaxy distanced 21 million light-years away from Earth in the constellation Ursa Major. Discovered by Pierre Méchain on March 27, 1781, it was communicated to Charles Messier who verified its position for inclusion in the Messier Catalogue as one of its final entries. (Wikipedia)

16 hours

600 lum x 60s

130 red x 60s

115 green x 60s

130 blue x 60s

DSS, average stack with 2x drizzle, Startools, Lightroom.

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    Center of the Pinwheel M101 with 140mm APO, Jonathan Young
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Description: Tweaked processing to improve core color balance, stars (better decon mask) and background noise profile (using statistical vs PV basis). Kept 2x drizzle w/o binning for 0.55"/pixel

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Center of the Pinwheel M101 with 140mm APO, Jonathan Young

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