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





    
        

            Thomas Richter
NGC 457 - Owl Cluster

NGC 457 - Owl Cluster

Technical card

Resolution: 3065x2293

Dates:Oct. 4, 2016

Frames:
Baader B 1.25'' CCD Filter: 17x180" bin 1x1
Baader G 1.25'' CCD Filter: 17x180" bin 1x1
Baader R 1.25'' CCD Filter: 17x180" -20C bin 1x1

Integration: 2.5 hours

Flats: ~30

Bias: ~100

Avg. Moon age: 3.15 days

Avg. Moon phase: 10.83%

Temperature: 4.00

Astrometry.net job: 1339547

RA center: 19.853 degrees

DEC center: 58.248 degrees

Pixel scale: 1.215 arcsec/pixel

Orientation: -44.845 degrees

Field radius: 0.646 degrees

Locations: Nürnberg, Nürnberg, Bayern, Germany

Description

Object description (wikipedia.org):

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)
3364
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NGC 457 - Owl Cluster, 





    
        

            Thomas Richter

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Astrofreunde-Franken