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Galaxy Field in Coma Berenices





Scope: Zenithstar 66 mm APO at f/4.6; Location: Blair Valley, Anza Borrego Park, CA;  27 March, 2009; Camera: Canon XT 350D (Baader ACF modified)

Exposure: 18 x 5 min  (no filters) ISO 800, 8 Darks, no Flats 

Processing: Images were captured with DSLR Focus  and saved as RAW file format. Images were decoded and dark corrected in IRIS. Images were aligned and stacked in IRIS with Sigma Median.  Dark point equalization and rough color balance  were done in IRIS. Gamma adjustments also done in Iris. Gradient removal was done in IRIS. The exposure stack was saved as Tiff.  Final stretching and touch up was done in PhotoShop. Star repair was made in Photoshop on edge stars since they suffered a bit with the wide field optics.  A light background noise reduction was applied using PixInsight LE (SGBNR)  Final Image size is approximately 3474x2314.

North is up in this image.  This image is guided.  This is an image of a region in Coma Berenices with several bright stars and a few galaxies. In the upper left is a galaxy NGC 4559; the lower left NGC 4565; there are numerous other galaxies that can be seen better on the full resolution image. The bright stars on the right from the red star on the top are 15, 14, 16, 13 Comae Berenices.  The dominant of the optical star pair on the bottom is 17 Comae Berenices. These stars range in distance from Earth between 170 and 282 light years while the larger galaxies are about 30-35 million light years distant. The Horizontal FOV is about 4 deg, 8 min.

Image Center is approximately - Equatorial 2000: RA: 12h 31m 33s Dec: +2703'52"

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

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