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Contains:  Bode's nebulae, M 81, M 82, NGC 3031, NGC 3034, NGC 3077
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M81 & M82 LRGB First Light, 


            Bradley Hargrave
M81 & M82 LRGB First Light
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M81 & M82 LRGB First Light

Technical card

Dates:March 10, 2019

Frames: 151x60" (gain: 139.00) -20C

Integration: 2.5 hours

Darks: ~50

Flats: ~30

Bias: ~100

Avg. Moon age: 3.52 days

Avg. Moon phase: 13.40%

Basic astrometry details job: 2587949

RA center: 9h 55' 38"

DEC center: +69° 23' 27"

Pixel scale: 1.998 arcsec/pixel

Orientation: 176.611 degrees

Field radius: 1.436 degrees

Resolution: 4064x3204

Data source: Backyard


First light with monochrome+filters imaging/processing. I think it went rather well!

Unity gain/offset -20c.
I also think unity might be too high of settings for my setup/skies for at least my L filter.
Adjustments to focal reducer are needed.
I will have do more testing.

Thanks for viewing!

151 x 60s L
45 x 120s R
40 x 120s G
40 x 120s B

6.6 hours



Bradley Hargrave
License: None (All rights reserved)


  • M81 & M82 LRGB First Light, 


            Bradley Hargrave
  • Final
    M81 & M82 LRGB First Light, 


            Bradley Hargrave


Description: Reprocess. Working out some kinks in workflow. Ran LinearFit on ONLY RGB.

Sky plot

Sky plot


M81 & M82 LRGB First Light, 


            Bradley Hargrave