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





    
        

            Marc Ricard
M81 & M82

M81 & M82

Technical card

Resolution: 6516x4844

Dates:Dec. 19, 2018Jan. 7, 2019Feb. 5, 2019March 1, 2019

Frames:
Astrodon Blue Tru-Balance E-series gen 2: 62x180" -20C bin 1x1
Astrodon Green Tru-Balance E-series gen 2: 62x180" -20C bin 1x1
Astrodon Red Tru-Balance E-series gen 2: 63x180" -20C bin 1x1
Astrodon Ha 31mm 3nm: 42x1200" -20C bin 1x1

Integration: 23.4 hours

Darks: ~30

Flats: ~30

Bias: ~99

Avg. Moon age: 9.50 days

Avg. Moon phase: 27.75%

Astrometry.net job: 2662836

RA center: 149.391 degrees

DEC center: 69.356 degrees

Pixel scale: 1.054 arcsec/pixel

Orientation: 89.498 degrees

Field radius: 1.189 degrees

Locations: Home, Pointe-Claire, Quebec, Canada

Data source: Backyard

Description

I don't usually image from my backyard during the winter simply because the snow exacerbates the light pollution. But this winter I tried t overcome it by capturing 187 x RGB frames of this bright duo and combining them with 23 x Ha frames. Then I did my best to get rid of the gradients but unfortunately I eliminated all traces of the IFN in the process making this familiar pair look somewhat lost in this wide field.

Comments

Author

suburbanastronomer
Marc Ricard
License: None (All rights reserved)
681
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Revisions

  • M81 & M82, 





    
        

            Marc Ricard
    Original
  • Final
    M81 & M82, 





    
        

            Marc Ricard
    C

Sky plot

Sky plot

Histogram

M81 & M82, 





    
        

            Marc Ricard