Contains: NGC 3077, M 82, NGC 3034, M 81, Bode's nebulae, NGC 3031
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Galaxies in Ursa Major

Technical card

Resolution: 4626x3700

Dates: Feb. 17, 2017

Frames: 492x120"

Integration: 16.4 hours

Avg. Moon age: 20.97 days

Avg. Moon phase: 62.36% job: 1495388

RA center: 149.507 degrees

DEC center: 69.130 degrees

Pixel scale: 1.336 arcsec/pixel

Orientation: -140.676 degrees

Field radius: 1.099 degrees


RGB with a synthetic luminance for detail. Lot of the IFN in the data but I couldn't stretch it too much because of reflection issues I'm tracking down. Added 3.6 hours of Ha data.

128 x 2min Red
130 x 2min Green
126 x 2min Blue
108 x 2min Ha

RGB at gain 75, offset 14
Ha at gain 200, offset 50

Processed in PixInsight

Thanks for looking!

Revision B - Annotated version



Dan Goelling

Sky plot

Sky plot


Galaxies in Ursa Major, 


        Dan Goelling