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Sharpless 172 and 173 in Cassiopeia



Scope: Explore Scientific MN152 Maksutov Newtonian at f/4.8, Location: Pine Creek, CA,  5 August 2016  Camera: ST8300M (Baader Ha LRGB filters)

Exposure: Exposure:  15 x 8 min (1x1 bin) exposure with IR/UV Block filter, 12 x  9 min (2x2 bin) exposure with H-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, and gradient removal - 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 both the IR/UV Blocking filter exposure stack and used for the luminance layer. The H-Alpha filter exposure was also screen blended into the Red filter exposure stack and used for the red channel. Images processed at 3352 x 2532 resolution. Final Image size is approximately  2600 x 1950.

North is up in this image.  Sharpless 173 is the large red nebula on the left; Sharpless 172 is the very small, dim nebula in the lower right. The open cluster NGC 103 can be seen in the lower left in this image. Sharpless 173 is also known as LBN 593 and there are other designated objects of Dark and Bright Nebulae within or nearby.  The bright star in the upper left is 12 Cassiopeia. These objects  are identified in the annotated image.   Horizontal FOV is 85'

Image center is approximately - Equatorial 2000: RA: 00h 20m 13.5s Dec: +6134'45"


All images and content remain the property of Jim Thommes - copyright 2003 - 2016 copyright 2003 - 2012

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