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Contains:  M 81, Bode's nebulae, NGC 3031
Getting plate-solving status, please wait...
M81 - LHaRGB, 


            Pascal Gouraud
M81 - LHaRGB

Technical card

Resolution: 2940x1654

Dates:March 26, 2019

Frames: 66x180"

Integration: 3.3 hours

Avg. Moon age: 20.55 days

Avg. Moon phase: 66.65% job: 2662998

RA center: 9h 55' 35"

DEC center: +69° 4' 12"

Pixel scale: 0.783 arcsec/pixel

Orientation: 129.589 degrees

Field radius: 0.367

Data source: Backyard


M81 taken in my garden in Britany (France). Quite significant pollution but with Pixinsight (1st tentative for image processing), I have been able to remove that with the Dynamic Background Extraction process....(crop version)
3H and 18 minutes of total duration with ASI 1600 at -25d and unity gain
Luminance : 19x180sec
Ha : 20x180sec
RVB = 27x180sec
35 Bias, 45 Darks, 15 Flats per filter



Pascal Gouraud
License: Attribution-NonCommercial-ShareAlike Creative Commons


  • Final
    M81 - LHaRGB, 


            Pascal Gouraud
  • M81 - LHaRGB, 


            Pascal Gouraud

Sky plot

Sky plot


M81 - LHaRGB, 


            Pascal Gouraud

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