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Prawn Nebula - IC 4628 in Scorpius



Scope: Megrez II at f/4.5,  Location: Laguna Mountains, CA   16 June,  2007,   Camera: Artemis285

Exposure: 8 x 300 sec H-Alpha (1x1), 8 x 120 sec RGB Exposures (2x2). 

Processing: Images were captured  with Artemis Capture (as FITs).  Aligned/stacked in Registax 4 and saved as FITS.  H-Alpha  and Color channels were scaled and  color balanced in Astroart. Channels were co-registered in Astroart.   Curves and Levels applied in Photoshop to the Luminance construction to optimize object features. Luminance construction consisted of the H-Alpha exposure. A light background noise filtering was applied to Luminance with PixInsight LE SGBNR. Final LRGB combine was done in Photoshop using Luminance Layering (or LLRGB). Selective sharpening was applied to nebula features in Photoshop with a layer mask.  Final Image size is approximately 1392x1044.

 North is up in this image. This is the common named "Prawn Nebula" cataloged as IC 4628. It is located in the constellation of Scorpius - close to the tail portion of Scorpius.    The Horizontal FOV is 90'.

Image center is located approximately - Equatorial 2000: RA: 16h 57m 17s Dec: -4028'13"


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

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