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The Great Wall of Cygnus, 



Technical card

Resolution: 922x1104

Dates:Oct. 31, 2014

Frames: 9x1200"

Integration: 3.0 hours

Avg. Moon age: 7.79 days

Avg. Moon phase: 54.32% job: 496292

Locations: Astro Anarchy Observatory, Oulu, Finland, Finland


This photo is originally published at 31.10. last year. At the time I made only a mapped color version of it.
Now I'm publishing the same image in visual spectrum. It's combined from three component exposures of an emission from the ionized elements, hydrogen , oxygen and sulfur. (H-alpha, O-III and S-II) Channels are combined by following method, Red = 75%H-alpha + 25%S-II Green = O-III and Blue = 80%O-III+20%H-alpha (to compensate otherwise missing H-beta emission.)

The Cygnus Wall, a part of the much larger North america Nebula, NGC 7000. This is a relatively bright formation, three hours of H-alpha light and half an hour of O-III was captured for this photo. S-II channel is borrowed from an older wide field image, since the clouds rolled in before I was able to shoot it.



License: Attribution-NonCommercial-NoDerivs Creative Commons


The Great Wall of Cygnus,