Hemisphere:  Northern  ·  Constellation: Cygnus (Cyg)  ·  Contains:  Extremely wide field
Cygnus, first pass edit (Astrotracer), 



    
        

            AlenK
Cygnus, first pass edit (Astrotracer)
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Cygnus, first pass edit (Astrotracer)

Cygnus, first pass edit (Astrotracer), 



    
        

            AlenK
Cygnus, first pass edit (Astrotracer)
Powered byPixInsight

Cygnus, first pass edit (Astrotracer)

Technical card

Imaging telescopes or lenses: SMC Pentax-M 28mm f/2.8

Imaging cameras: Pentax K-3 II


Dates:July 18, 2020

Frames: 65x30" ISO800

Integration: 0.5 hours

Avg. Moon age: 27.26 days

Avg. Moon phase: 5.72%

Bortle Dark-Sky Scale: 4.00


Basic astrometry details

Astrometry.net job: 3713156

RA center: 20h 4' 31"

DEC center: +36° 7' 15"

Pixel scale: 56.940 arcsec/pixel

Orientation: 45.392 degrees

Field radius: 24.674 degrees


Resolution: 2596x1731

Data source: Traveller

Description

Most of the constellation of Cygnus. Tracking by Astrotracer (built in to camera), with the camera mounted directly to a tripod. The lens was stopped down to f/4, where star shapes become merely acceptable.

This is a first (quick) pass at processing of the stack without darks, bias or flats. Stacked in Sequator and stretched in rnc-color-stretch. This is a modest crop from the full 28mm field of view to remove edge artifacts from stacking.

There was some slight haze that night, which may account for the faint halos around the brightest stars. I would have done star enlargement for the brightest stars (only) in processing to make the constellation stand out better in any case, so not really a problem.

PS. An improved edit will come because I now have 2.2 hours of subs to integrate.

Comments

Revisions

  • Cygnus, first pass edit (Astrotracer), 



    
        

            AlenK
    Original
  • Final
    Cygnus, first pass edit (Astrotracer), 



    
        

            AlenK
    B

Sky plot

Sky plot

Histogram

Cygnus, first pass edit (Astrotracer), 



    
        

            AlenK