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Contains:  NGC 457, The star φCas
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Owl Cluster - NGC 457, 





    
        

            Thomas Richter

Owl Cluster - NGC 457

Technical card

Resolution: 5389x3572

Dates:Nov. 5, 2018

Frames:
Baader B 1.25'' CCD Filter: 18x120" (gain: 53.00) -20C bin 1x1
Baader G 1.25'' CCD Filter: 18x120" (gain: 53.00) -20C bin 1x1
Baader R 1.25'' CCD Filter: 18x120" (gain: 53.00) -20C bin 1x1

Integration: 1.8 hours

Darks: ~29

Flats: ~27

Avg. Moon age: 27.29 days

Avg. Moon phase: 5.58%

Astrometry.net job: 2382033

Locations: Nürnberg, Nürnberg, Bayern, Germany

Data source: Backyard

Description

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.

Comments

Author

superelch
Thomas Richter
License: None (All rights reserved)
3657
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Revisions

  • Owl Cluster - NGC 457, 





    
        

            Thomas Richter
    Original
  • Final
    Owl Cluster - NGC 457, 





    
        

            Thomas Richter
    B

Histogram

Owl Cluster - NGC 457, 





    
        

            Thomas Richter