Cookie consent

AstroBin saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing AstroBin without changing the browser settings, you grant us permission to store that information on your device.

I agree
Contains:  NGC 457, The star φCas
Getting plate-solving status, please wait...
NGC 457 - Owl Cluster, 


            Thomas Richter
NGC 457 - Owl Cluster

NGC 457 - Owl Cluster

Technical card

Resolution: 3065x2293

Dates:Oct. 4, 2016

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 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


Object 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.



Thomas Richter
License: None (All rights reserved)

Sky plot

Sky plot


NGC 457 - Owl Cluster, 


            Thomas Richter

In these public groups