Southern Cygnus Loop
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ON IMAGE FOR FULL SIZE VIEW (2000
x 1500) 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: +30°00'03"
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