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Friday, November 30, 2018

Dark dust in Cygnus



Mosaic images needs usually a lots of work and time to be ready. Nothing can beats the resolution of a good mosaic image of the large cosmic object. Since it can take even years to have a finalized photo, I'm trying to shoot subframes of the mosaic image as an individual artworks. many of my mosaic images have been published first as a series of subimages, acting as an individual artworks 

Here is one of those subimages, dark dust clouds of Cygnus. It's a part of large Cygnus nebula complex. More accurately, a part of dust ridge dividing North America and Pelican Nebulae.


Dark Clouds of Cygnus
Please, click for a large photo
  


Image is in Natural color palette from the emission of ionized elements, R=Hydrogen + Sulphur, G=Oxygen and B=Oxygen + 10% Hydrogen to compensate the missing H-beta emission.



Position in the large 16 panel mosaic image of NA and Pelican Nebula
Please, click for a large photo



Technical details

Processing workflow

Image acquisition, MaxiDL v5.07.
Stacked and calibrated in CCDStack2.
Deconvolution with a CCDStack2 Positive Constraint, 33 iterations, added at 50% weight
Color combine in PS CS3
Levels and curves in PS CS3.

Imaging optics
Celestron Edge HD 1100 @ f10 with 0,7 focal reducer for Edge HD 1100 telescope

Mount
10-micron 1000

Cameras and filters
Imaging camera Apogee Alta U16 and Apogee seven slot filter wheel
Guider camera, Lodestar x 2 and SXV-AOL

Astrodon filters,
5nm H-alpha 3nm S-II and 3nm O-III

Exposure times

Total exposure time for the whole 16 panel mosaic image is around 200 hours.


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