SH2-115 and 116 in Cygnus
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ON IMAGE FOR FULL SIZE VIEW (2800x2100) Scope:
FSQ-106N at f/5, Location: Laguna Mountains, CA 20 July 2014
Camera: Atik 383L Exposure:
Exposure: 18 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 2800 x 2100. North is up in this
image. In this image the Sharpless 115 region and is dominated by that emission
nebula. This region is within the Cygnus-X star forming area - there are Dickel,
Wendker, and Bieritz (DWB) catalog entries for this field (10 DWB objects). The
little red object at the upper right is Sharpless 116 - it also has a planetary
Nebula designation since prior to 1991 it was thought to be such an object. It
is now believed to simple be a Hydrogen emission nebula so the Sharpless
designation is more appropriate. The star cluster (Berkeley 90) is surrounded by
Sharpless 115 and one of its massive stars provides the emission energy. These
objects are identified in the annotated
image. This image replaces an earlier image that can be seen in the archives
here. Horizontal FOV is 120' Image
center is approximately - Equatorial 2000: RA: 20h 33m
53s Dec: +46°55'44"
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