Celestial hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  M 101  ·  NGC 5447  ·  NGC 5449  ·  NGC 5450  ·  NGC 5451  ·  NGC 5453  ·  NGC 5455  ·  NGC 5457  ·  NGC 5461  ·  NGC 5462  ·  NGC 5471  ·  Pinwheel galaxy
Pinwheel Galaxy (M101) - HaLRGB, dswtan
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Pinwheel Galaxy (M101) - HaLRGB

Pinwheel Galaxy (M101) - HaLRGB, dswtan
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Pinwheel Galaxy (M101) - HaLRGB

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Description

First run at M101 for 2021, first time in HaLRGB for me.

12+hrs total integration so far, plus 10hrs of Ha. This is my longest ever integration total.

517x 60sec L2

85x 60sec RGB each

622x 60sec Ha

I think this needs some tweaking as the LRGB seems just a bit more detailed and there seems to be more processing artifacts on this compared to the LRGB, but sharing as a useful comparison and reference point. The background is darker too, probably too crushed. Ok for a v1 though. cf. https://astrob.in/e019z6/0/ (LRGB)

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Pinwheel Galaxy (M101) - HaLRGB, dswtan

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Cloudy Nights