Spiral galaxy M81 in Ursa Major

Posted by Joe Ulowetz
on Wednesday, October 5, 2011

Feb 2011; Northbrook, IL (mag 3 sky)

Lum 28x5min

R 14x5min

G 14x5min

B 14x5min

Scope: C9.25 (235mm) at f/10 

Mount: Losmandy G-11/Gemini

Camera: QSI-583ws camera, -25C, all images binned 2x2

Images acquired w/ MaxIm DL 4 plus custom automation script written in Python.

Stacked in CCDStack2, combined and processed in Photoshop CS2

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