Image of the day 12/27/2015

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Technical card

Resolution: 2756x2104

Dates: March 15, 2009March 16, 2009March 17, 2009June 11, 2015June 12, 2015June 13, 2015June 14, 2015June 15, 2015June 16, 2015

Astrodon Blue Tru-Balance E-Series Gen 2: 12x600" bin 2x2
Astrodon Green Tru-Balance E-Series Gen 2: 12x600" bin 2x2
Astrodon Luminance Tru-Balance E-Series Gen 2: 40x1800" bin 1x1
Astrodon Red Tru-Balance E-Series Gen 2: 12x600" bin 2x2

Integration: 26.0 hours

Avg. Moon age: 24.07 days

Avg. Moon phase: 34.57% job: 892428

RA center: 194.967 degrees

DEC center: 28.004 degrees

Pixel scale: 0.507 arcsec/pixel

Orientation: -158.074 degrees

Field radius: 0.244 degrees

Locations: Sierra Remote Observatories, Shaver Lake, California, United States


The Luminance images for the Coma Cluster were gathered at the Sierra Remote Observatories. The RGB data was generously donated by Bob Franke from his Focal Pointe Observatories.

Thank you very much Bob.

If you look at the image closely, there are too many galaxies to count. Almost every object that is not round is a galaxy. Here is the description of the Coma Cluster from Wikipedia.

The Coma Cluster (Abell 1656) is a large cluster of galaxies that contains over 1,000 identified galaxies. Along with the Leo Cluster (Abell 1367), it is one of the two major clusters comprising the Coma Supercluster. It is located in and takes its name from the constellation Coma Berenices.

The cluster's mean distance from Earth is 99 Mpc (321 million light years). Its ten brightest spiral galaxies have apparent magnitudes of 12–14 that are observable with amateur telescopes larger than 20 cm. The central region is dominated by two supergiant elliptical galaxies: NGC 4874 and NGC 4889. The cluster is within a few degrees of the north galactic pole on the sky. Most of the galaxies that inhabit the central portion of the Coma Cluster are ellipticals. Both dwarf and giant ellipticals are found in abundance in the Coma Cluster.



Eric Coles (coles44)

Sky plot

Sky plot


The Coma Cluster of Galaxies, Abell 1656, LRGB Image, Eric Coles (coles44)