Hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  Bode's galaxy  ·  Bode's nebulae  ·  M 81  ·  M81  ·  NGC 3031
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M81 - LHaRGB, 



    
        

            Pascal Gouraud
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M81 - LHaRGB

Imaging telescopes or lenses: LACERTA NEWTON 250 F/D 4 1000mm

Imaging cameras: ZWO ASI 1600MM-Cool Pro ASI 1600MM pro

Mounts: iOptron CEM60

Guiding cameras: ZWO ASI ASI120MM

Focal reducers: TS Optics GPU 2" Coma Corrector

Software: Pleiades Astrophoto PixInsight 1.8.5 Ripley  ·  Stellarium, Stellarium Scope

Filters: Zwo 36mm SHO  ·  Zwo 36mm LRGB


Dates:March 26, 2019

Frames: 66x180"

Integration: 3.3 hours

Avg. Moon age: 20.55 days

Avg. Moon phase: 66.65%


Astrometry.net job: 3275532

RA center: 9h 55' 38"

DEC center: +69° 4' 35"

Pixel scale: 0.750 arcsec/pixel

Orientation: -129.695 degrees

Field radius: 0.345 degrees


Resolution: 2703x1916

Data source: Backyard

Description

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

Comments

Revisions

  • M81 - LHaRGB, 



    
        

            Pascal Gouraud
    E
  • M81 - LHaRGB, 



    
        

            Pascal Gouraud
    F
  • M81 - LHaRGB, 



    
        

            Pascal Gouraud
    G
  • Final
    M81 - LHaRGB, 



    
        

            Pascal Gouraud
    H

E

Description: reprocessing with Pixinsight again.

Uploaded: ...

F

Description: Reprocessing and crop.

Uploaded: ...

G

Description: New processing with PIxinsight.

Uploaded: ...

H

Description: New processing and crop with pixinsight

Uploaded: ...

Sky plot

Sky plot

Histogram

M81 - LHaRGB, 



    
        

            Pascal Gouraud

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