NGC 6940 in Vulpecula

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Scope: Zenithstar 66 mm APO  at f/4.7, Location: Laguna Mountains, CA   29 August 2011  Camera: Artemis285

Exposure: 15 x 3 min  (1x1 bin) exposure with UV/IR block, 8 x 1.5 min (2x2 bin) RGB exposures.

Processing: Images were captured  with Artemis Capture (as FITs).  Aligned/stacked and dark subtracted in Astroart with Sigma Combine.   IR / UV Blocking  filter  and Color channels were scaled and  color balanced in Astroart.  Channels were co-registered in Astroart.   Central gradient removal was performed in Astroart. Luminance channel consisted of the IR/UV blocking filter exposures.  Curves and Levels applied in Photoshop to the Luminance channel to optimize star depth.   Final LRGB combine was done in Photoshop.    Final Image size is approximately 1800 x 1350.

North is up in this image. The star cluster NGC 6940 is located in the constellation of Vulpecula.   NGC 6940 distance to Earth is  about 2,600 light years.   Horizontal FOV is approximately 100'

Image center is approximately - Equatorial 2000: RA: 20h 34m 36.0s Dec: +28°18'00"  

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

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