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SH2-170 in Cassiopeia



Scope: C8 at f/4.7,  Location: Blair Valley, Anza Borrego Desert, CA   21 October 2006,   Camera: Artemis285

Exposure: 6 x 480 sec H-Alpha (1x1),   6 x 60 sec RGB Exposures (2x2). 

Processing: Images were captured  with Artemis Capture (as FITs).  Aligned/stacked in Registax 3 and saved as FITS. Luminance,  H-Alpha, IR/UV Block,  and Color channels were scaled and  color balanced in Astroart. Channels were co-registered in Astroart.  Central Gradient removal was done in Astroart. Curves and Levels applied in Photoshop to the HA Exposure to optimize object features. Luminance construction consisted of the H-Alpha exposure alone. The Red channel was a mix (lighten) of the Red exposure and the extracted nebula portion of the HA exposure. Final LRGB combine was done in Photoshop using Luminance Layering (or LLRGB) - G2V calibration factors and Atmospheric Extinction factors were applied.  Photoshop Surface blur was lightly applied on the Luminance construction. Slight sharpening was applied.  Final Image size is approximately 1392x1040.

All exposures in this image were guided; North is up in this image. This object is catalogued in the Sharpless catalog as SH2-170. It is a fairly dim Hydrogen Emission object - accounting for the mostly red color. SH2-170 is located in the constellation of Cassiopeia . The Horizontal FOV is 33'.

Image center is located approximately - Equatorial 2000: RA: 00h 01m 34s Dec: +6437'23"


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

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