E.T. Cluster (NGC 457)

Posted by JaspalChadha
on Monday, August 24, 2015

NGC 457 (also known as the Owl Cluster, the ET Cluster, or Caldwell 13) is thought to be about 21 million years old, and about 7,900 light years from Earth. It contains about 150 stars. There are at least a several dim galaxies in the field, all 17th magnitude or fainter.
Colour is a function of temperature (redder is cooler; bluer is hotter) there are several galaxies in the view of field

Few galaxies that confirmed by SIMBAD Database
267 Million Light years
PGC 2528351 galaxy (15+ Mag)
PGC137485 galaxy (15+ Mag)
PGC 4831 galaxy

Technical Data
Date: 19/07/2015, London UK ( Poor conditions )
Telescope: Altair Astro RC 250TT with Focal reducer
Chroma Technology filters L 5 x 300 seconds RGB 5 x 300 seconds
Ioptron CEM60 mount

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