Abell 2700 - Galaxy Cluster
The galaxy cluster Abell 2700 is located nearly 1.3 billion light-years from Earth in the constellation Pegasus. It moves away at 28,000 kilometers per
second - that is 9.3% of the speed of light.
The brightest galaxy is "LEDA 1214930" with an apparent magnitude of 15.1mag and a size of 1.1' (arcminutes). With the known distance the absolute
magnitude can be determined to M= -22.9mag and the true size to 420,000 light years. So the galaxy belongs to the class of giant ellipses.
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In a 20 inch Dobsonian at a magnification of 270x the galaxy cluster can be seen quite nicely, even if the galaxies are only loosely scattered. In total 13
galaxies could be seen. A few brighter stars provide a nice contrast.
