Celestial hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  M 101  ·  NGC 5455  ·  NGC 5457  ·  NGC 5461  ·  NGC 5471
Pinwheel gone bad, Trish Hamlin
Pinwheel gone bad
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Pinwheel gone bad

Acquisition type: Electronically-Assisted Astronomy (EAA, e.g. based on a live video feed)
Pinwheel gone bad, Trish Hamlin
Pinwheel gone bad
Powered byPixInsight

Pinwheel gone bad

Acquisition type: Electronically-Assisted Astronomy (EAA, e.g. based on a live video feed)

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Update: the problem was not the lens shade or lack thereof. The brightness is actually read noise. )this was one of my first tries with long focal length imaging - my subs were too short, I didn’t use darks, and I stretched too much in a vain attempt to make up for my ignorance.

After spending hours polar aligning, PEC training, starlock training, etc .. I forgot to put the lens shade on and this is what I got. Live and learn.

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Pinwheel gone bad, Trish Hamlin