Celestial hemisphere:  Northern  ·  Constellation: Cepheus (Cep)  ·  Contains:  Fireworks Galaxy  ·  NGC 6939  ·  NGC 6946
NGC 6946 with NGC 6939, Michael Gruenwald
NGC 6946 with NGC 6939
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NGC 6946 with NGC 6939

NGC 6946 with NGC 6939, Michael Gruenwald
NGC 6946 with NGC 6939
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NGC 6946 with NGC 6939

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Description

The Fireworks Galaxy, NGC6946, is about 22 Million lightyears distant, and its vast Ha regions show up even in this RGB image. The open cluster NGC 6939 is just some 4000 light years away, and "only" about a billion years old.

3 nights in hot and high humidity conditions got me some 16 hours of RGB data. 

comments and criticism are invited

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NGC 6946 with NGC 6939, Michael Gruenwald