Celestial hemisphere:  Northern  ·  Constellation: Cassiopeia (Cas)  ·  Contains:  34 Cas  ·  NGC 457  ·  Owl Cluster  ·  The star φ Cas
An Owl and a Shrimp, Michael Gruenwald
An Owl and a Shrimp
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An Owl and a Shrimp

An Owl and a Shrimp, Michael Gruenwald
An Owl and a Shrimp
Powered byPixInsight

An Owl and a Shrimp

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Description

SH2-188 and NGC457 in one frame. 

The Owl Cluster is slightly more than 7,900 light-years away. It is 13′ across and one of the brightest open clusters in Cassiopeia at magnitude 6.4. beautiful and colorful, this was obviously processed in RGB, with a integration time of just over 6 hours

Wareing wrote an interesting (free access) article about SH2-188 in 2006, https://academic.oup.com/mnras/article/366/2/387/1213168?login=false, discussing how its shape developed over the last 20000 years as a result of interaction of a supernova remnant with the Interstellar Medium. With an SHO integration time of about 24 hours I have plenty of good data, and found this, after StarXterminator to be a great object to improve GHS skills.

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An Owl and a Shrimp, Michael Gruenwald