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.

 

Luminance channel

 

Technical Data

Bortle Scale / SQM-L Bortle 4/5  / -20.10 - 20.34
Period June 2021
Primary Scope  CCA250 / FSQ106  
Camera CMOS IMX455 / CCD  KAF-8300
Mount AP 1100 GTO CP4
Total Exposure Time 6H
Composition LRGB
Location Val Imagna (Bergamo) Italy

 

the IRIS Nebula Recorded in September 2016

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

Download Free FREE High-quality Joomla! Designs • Premium Joomla 3 Templates BIGtheme.net