NGC7023 Iris Nebula

The Iris Nebula, also known as NGC 7023 and Caldwell 4, is a bright reflection nebula and Caldwell object in the constellation Cepheus. NGC 7023 is actually the cluster within the nebula, LBN 487, and the nebula is lit by a magnitude +7 star, SAO 19158. It shines at magnitude +6.8. It is located near the Mira-type variable star T Cephei, and near the bright magnitude +3.23 variable star Beta Cephei (Alphirk). It lies 1,300 light-years away and is six light-years across.

Technical Data

Bortle Scale / SQM-L Bortle 4/5  / --
Period September 2016
Primary Scope  FSQ106  106/530
Camera CCD  KAF-8300
Mount NEQ6
Total Exposure Time 6H
Composition LRGB
Location Val Imagna (Bergamo) Italy

 

 © Efrem Frigeni Astrophoto

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