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: +48°27'02"
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