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NGC 147 and NGC 185 Cassiopeia

 

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Scope: Zenithstar 66 mm APO at  f/4.7 Location: Laguna Mountains, CA   16 July 2010  Camera: Artemis285

Exposure: 11 x 7 min  Luminance with IR Block Filter (bin 1x1); 6 x 3 min RGB (2x2 bin)

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 construction consisted of the IR/UV blocking filter exposures.  Curves and Levels applied in Photoshop to the Luminance construction to optimize object features.    Final LRGB combine was done in Photoshop using Luminance Layering.  .   Final Image size is approximately 1392 x 1040.

North is up in this image. NGC 147 is the galaxy on the right; NGC 185 is the galaxy on the left These galaxies are dwarf Elliptical galaxies part of the local group and form a physical pair. They are also remote satellite galaxies of the larger Andromeda Galaxy located about 7 degrees to the south. These dwarfs are approximately 2.4 million light years distant from Earth.. Horizontal FOV is 100'

Image center is approximately - Equatorial 2000: RA: 00h 35m 53s Dec: +4827'02" 

 

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

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