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LBN 223 and DWB 41 in Cygnus



Scope: FSQ-106N at f/5, Location: Tierra Del Sol - SDAA Club site, CA   22 July 2017  Camera: Atik 383L (Astronomik Gen 2 Ha LRGB Filters)

Exposure: Exposure: 14 x 8 min  (1x1 bin) exposure with UV/IR block, 12 x 8 minutes (2x2 bin)  exposure with Hydrogen Alpha 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 - 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.  The H-Alpha filter exposure was screen blended into the IR/UV Blocking filter exposure stack and used for the luminance layer. Ha was screen blended into the Red channel -  emission balance of RGB done with Channel Mixer in Photoshop. Images processed at 3352 x 2532 resolution. Final Image size is approximately  2600 x 1950.

North is up in this image.  The primary object in this image is LBN 223 and DWB 41. These objects are the brighter area of nebulosity just left of center that generally overlap each other. LBN 233 is somewhat smaller by catalog description than DWB 41. Other catalogued emission nebulae in this field are LBN 214, DWB 52, DWB 35, and DWB 28. There are several cataloged dark nebulae in this field as well including two Barnard dark nebulae B344 and B343. The monochrome H-Alpha image is shown below.  These objects  and some of the brighter stars are identified in the annotated image.    Horizontal FOV is approximately 120 arc minutes.

Image center is approximately - Equatorial 2000: RA: 20h 12m 43s Dec: +3957'13" 


H-Alpha Image:


All images and content remain the property of Jim Thommes - copyright 2003 - 2017

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