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Contains:  M 81, Bode's nebulae, NGC 3031
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M81 / NGC 3031 - First light after cleaning mirrors, 





    
        

            Falk Schiel
M81 / NGC 3031 - First light after cleaning mirrors

M81 / NGC 3031 - First light after cleaning mirrors

Technical card

Resolution: 5380x3580

Dates:Dec. 15, 2018

Frames:Baader Skyglow Neodymium 1.25": 30x180" -20C

Integration: 1.5 hours

Darks: ~40

Flats: ~100

Avg. Moon age: 7.40 days

Avg. Moon phase: 50.23%

Bortle Dark-Sky Scale: 4.00

Mean FWHM: 6.00

Temperature: -3.00

Astrometry.net job: 2427507

RA center: 148.916 degrees

DEC center: 69.057 degrees

Pixel scale: 0.656 arcsec/pixel

Orientation: 52.405 degrees

Field radius: 0.588 degrees

Locations: Backyard, Nuremberg, Germany

Data source: Backyard

Description

Seeing was a mess. But I had to check whether I ruined the mirrors. I suppose the mirrors are all right but the secondary mirror is not fully aligned. I want to get rid of the small additional spikes around the stars. Any advice will be appreciated if you identify an obvious issue.

Comments

Author

fschiel
Falk Schiel
License: Attribution-NonCommercial-NoDerivs Creative Commons
2451
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Revisions

  • M81 / NGC 3031 - First light after cleaning mirrors, 





    
        

            Falk Schiel
    Original
  • Final
    M81 / NGC 3031 - First light after cleaning mirrors, 





    
        

            Falk Schiel
    B

B

More detail and contrast.

Sky plot

Sky plot

Histogram

M81 / NGC 3031 - First light after cleaning mirrors, 





    
        

            Falk Schiel