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Southern Cygnus Loop



Scope: FSQ-106N at f/5, Location: Laguna Mountains, CA   22 August 2014  Camera: Atik 383L

Exposure: Exposure: 17 x 8 min  (2x2 bin)  exposure with Hydrogen Alpha filter, 8 x 4 min (2x2 bin) RGB exposures.

Processing: Data Collection -  Artemis Capture (as FITs).  Calibrated, stacked (Kappa Sigma Combine) - Deep Sky Stacker. LRGB channel registration, equalization, and central gradient removal - Astroart.  Curves, Levels, RGB combine - ImagesPlus. Luminance Layering, final stretch, and finishing  - Photoshop. This image is a  Ha- RGB combine with Luminance layering.  Color saturation in LAB color; H-Alpha exposure stacks were used for the luminance layer.   Processing was in up-sampled  data (to simulate 1x1 bin). Final Image size is approximately 2000 x 1500.

North is to the left in this image. This image is a field of the Southern portion of the Cygnus loop - South being to the right. Cygnus Loop is the common name for the optically large supernova remnant in our late summer, early autumn sky. Its catalog identifications are SNR G074.0-08.6, or Sharpless 103. This image is only a very small portion of the SNR. The distance of this SNR was originally estimated at 2,500 light years, however, more recent data suggests it is closer - approximately 1,470 light years. A DSLR image of the full loop can be seen here.   Horizontal FOV is 120'

Image center is approximately - Equatorial 2000: RA: 20h 50m 54s Dec: +3000'03"


All images and content remain the property of Jim Thommes - copyright 2003 - 2014

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