Celestial hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  M 101  ·  NGC 5457  ·  NGC 5461  ·  NGC 5473
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M101 - Pinwheel - Ha/LRGB, Tim

M101 - Pinwheel - Ha/LRGB

Getting plate-solving status, please wait...
M101 - Pinwheel - Ha/LRGB, Tim

M101 - Pinwheel - Ha/LRGB

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Description

Still working my way through the beginner-friendly targets.  Second galaxy attempt.  Need to really figure out the best way to incorporate the Ha data... tried 3 different methods.  I suspect it's all down to proper masking, which is still some form of dark art to me in PixInsight.

RGB= 25 x 240s= 1.7 hr
L= 55 x 240s= 3.7 hr
Ha= 55 x 300s= 4.6 hr

Western NC mountains.  Bortle 4.5

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M101 - Pinwheel - Ha/LRGB, Tim