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LDN 115, 118, 122, 129, 132, 146



Scope: FSQ-106N at f/5, Location: Curiosity Peak Observatory, Julian, CA   13 June 2015  Camera: Atik 383L

Exposure: Exposure:  16 x 10 min (1x1 bin) exposure with IR/UV Block filter, 8 x 4 min (2x2 bin) RGB exposures.

Processing: Data Collection -  Sequence Generator Pro (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  RGB combine with Luminance layering.  Color saturation in LAB color; IR/UV Blocking filter exposure stack was used for the luminance layer.  Final Image size is approximately 2800 x 2105.

North is up in this image.  This image shows a region of Dark nebulae. From the Lynd's Dark Nebula catalog, this image contains designations of  LDN 115, 118, 122, 129, 132, and 146. In addition there are several dark nebulae with designations in the Dobashi and TGU dark nebula catalogs. There are a few background galaxies in this image as well. One special surprise is the comet C/2014 R1 (Borisov) located in the upper middle of the image. The comet moved over several arc minutes during the exposure session and  would appear as an amorphous blur normally. However, special comet tracking processing was used in a blend with normal processing to represent the comet more clearly in its "average" position over the individual IR/UV Block exposure frames These objects  as well as some of the brighter stars  are identified in the annotated image.  Horizontal FOV is 112'

Image center is approximately - Equatorial 2000: RA: 16h 55m 17s Dec: -1611'03"


All images and content remain the property of Jim Thommes - copyright 2003 - 2015 copyright 2003 - 2012

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