NGC 457

Introduction | Map | Sketch | My Own Observations | References

On this page I collect my observations of the globular star cluster NGC 457 in the constellation Cassiopeia.



The open star cluster NGC 457 in the constellation Cassiopeia got its name Owl Cluster due to its characteristic shape; it is also called ET Cluster.

Size: 15' x 10' (Stoyan)
Distance: 7,900 light years (Stoyan)
Rating: *** (Stoyan)



NGC 457 (Owl Cluster) is at the right edge of the star field in Cassiopeia including M 103, NGC 654, and NGC 663. For orientation purposed, the Andromeda galaxy M 31 is included in the map, as well as the Perseus double cluster NGC 884/869 and above it St 2, which, according to Stoyan, is a "must" for small telescopes.



The sketch by Michael Vlasov ( provides a rough impression of what I may have wanted to observe in Summer/Autumn 2016: Sketch of the NGC 457 Cluster by Michael Vlasov (Copyright © Michael Vlasov 2016)

Note: I only have the author's permission to link to the sketch.


My Own Observations

Observations Summer to Autumn 2016

Probably not observed, but included as a reminder for future observations...

Beobachtungen September 2017

Observed several times with Sky-Watcher Heritage 100P (in various magnifications) in Sumène, Haute Loire (France).



On this Site