Uploaded 8-Nov-10
Taken 8-Nov-10
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Dimensions1600 x 1107
Original file size797 KB
Image typeJPEG
Color spacesRGB
Date modified8-Nov-10 12:54
NGC 457 Owl/ET

NGC 457 Owl/ET

11.06.10
Canon 7D, C11 + 6.3, EQ6 EQMOD, guided with 9x50 Finder Scope, DSI Pro I
35 x 60 seconds @ 800 ISO
20 Dark frames
20 Flats
50 Bias
Total Exposure: 35 minutes

NGC 457 (also known as the Owl Cluster, the ET Cluster, or Caldwell 13) is an open star cluster in the constellation Cassiopeia. It was discovered by William Herschel in 1787. and lies over 7,900 light years away from the Sun. It has an estimated age of 21 million years. The cluster is sometimes referred by amateur astronomers as the Owl Cluster, Kachina Doll Cluster, the ET Cluster (due to its resemblance to the movie character) or the "Skiing Cluster". Two bright stars, magnitude 5 Phi-1 Cassiopeiae and magnitude 7 Phi-2 Cassiopeiae can be imagined as eyes. The cluster features a rich field of about 150 stars of magnitudes 12-15. (from Wikipedia)