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The Crumbling Wall of Cygnus, 


            Jari Saukkonen
The Crumbling Wall of Cygnus

The Crumbling Wall of Cygnus

Technical card

Resolution: 1780x2111

Dates:Sept. 1, 2019

Astrodon E-series 2 B: 20x120" (gain: 76.00) -25C bin 1x1
Astrodon E-series 2 G: 20x120" (gain: 76.00) -25C bin 1x1
Astrodon E-series 2 R: 20x120" (gain: 76.00) -25C bin 1x1
Astrodon Ha 5nm: 129x300" (gain: 200.00) -25C bin 1x1
Astrodon OIII 5nm: 60x300" (gain: 200.00) -25C bin 1x1
Astrodon SII 5nm: 60x300" (gain: 200.00) -25C bin 1x1

Integration: 22.8 hours

Darks: ~50

Flats: ~25

Flat darks: ~50

Avg. Moon age: 2.42 days

Avg. Moon phase: 6.47%

Mean FWHM: 2.30 job: 2916907

RA center: 315.204 degrees

DEC center: 43.836 degrees

Pixel scale: 0.693 arcsec/pixel

Orientation: 34.193 degrees

Field radius: 0.266 degrees

Locations: Komakallio, Kirkkonummi, Finland

Data source: Own remote observatory

Remote source: Non-commercial independent facility


Inside the North America nebula, intense radiation pressure from bright young stars is slowly ripping apart the formation known as the Cygnus Wall. A heavy crop from the full field to emphasize the interesting details. SHO for the nebula, mixed with stars from RGB exposures.

This is also the "official" first light for my new 10" f/3.8 newtonian that I designed and built. The design goal was to combine a wide field with lots of aperture (obviously also requiring a larger camera..), but it seems also to perform very nicely resolution-wise. The best subframes had a FWHM down to 2" just after collimation. Unfortunately I'm still working on some collimation stability improvements so the stars are a bit elongated here and there as I could not recollimate the scope every night.



Jari Saukkonen
License: None (All rights reserved)

Sky plot

Sky plot


The Crumbling Wall of Cygnus, 


            Jari Saukkonen