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DWB-118 "Propeller Nebula" Region - Cygnus



Scope: FSQ-106N at f/5, Location: Laguna Mountains, CA   15 July 2015  Camera: Atik 383L

Exposure: Exposure:  16 x 8 min (1x1 bin) exposure with H-Alpha filter, 10 x 5 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. RGB calibration - eXcalibrator. This image is a  RGB combine with Luminance layering.  Color saturation in LAB color; H-Alpha exposure stack was screen blended into the IR/UV Blocking filter exposure stack for the luminance layer.  Final Image size is approximately 2800 x 2062.

North is to the right in this image.  This image is dominated by the central bright Nebula known as DWB 118 (from the Dickel, Wendker, and Bieritz Catalog of the Cygnus-X region). Distance and ienergizing source are not known. It is also in a region with some obscuring dust intervening. The filed is well represented in the DWB catalog - there are fourteen cataloged items present in this image field (DWB 90, 107, 108, 111, 117, 118, 119, 120, 125, 126, 131, 132, 133, 136). There are a few dark nebulae cataloged that are in this image field as well. These objects  as well as some of the brighter stars  are identified in the annotated image.  This image replaces and earlier image that can be seen here. Horizontal FOV is 116'

Image center is approximately - Equatorial 2000: RA: 20h 16m 29s Dec: +4338'31"


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

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