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Sharpless 302 in Puppis



Scope: C8  f/4.2 Location: Dos Picos Park, Ramona, CA   17 January 2009  Camera: Artemis285

Exposure:  8 x 12 min H-Alpha (1x1 bin),  8 x 2 min RGB Exposures (2x2 bin) 

Processing: Images were captured  with Artemis Capture (as FITs).  Aligned/stacked and dark subtracted in Astroart with Sigma Combine.   H-Alpha  and Color channels were scaled and  color balanced in Astroart.  Central Gradient was removed in Astroart. Channels were co-registered in Astroart.   Luminance construction consisted of the H-Alpha exposure.  Curves and Levels applied in Photoshop to the Luminance construction to optimize object features.  A light background noise reduction was applied to the luminance construction in PixInsight LE (SBNR).   Final LRGB combine was done in Photoshop using Luminance Layering in LAB color Space.  A light sharpening was applied.   Final Image size is approximately 1392 x 1044.

All exposures in this image were guided; North is up in this image.  Sharpless - 302 is a region of emission nebulosity in the constellation of Puppis. The nebulosity is hydrogen gas excited to self emission by intense nearby stars.  Sharpless - 302 is part of molecular cloud A in front of supershell GS234-02 and is located at a distance of about 5,800 light years distant from Earth.  The Horizontal FOV is 36'.

Image center is located approximately - Equatorial 2000: RA: 07h 31m 41.0s Dec: -1658'43" 


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

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