Iris Nebula NGC 7023

Click to enlarge

Click to enlarge

Common Name: Iris Nebula
Formal Name: NGC 7023
Date: 6/23/2015
Constellation: Cepheus
Location: Casa Grande
Hardware: Takahashi Sky90 on Paramount, SBig ST2000XM Camera/Filter Wheel

unguided exposures

Temperature: -0C
Bin Mode: 1×1
Images: (x) x 15 minute Red exposures
(x) x 15 minute Green
(x) x 15 minute Blue
Total Time = x hours
Sky Flat fields 
Processing: This version uses only RGB exposures (Synthetic Lum by integrating RGB).
Reduced in Maxim, Aligned/Stacked/Processed in PixInsight
Notes: The Iris Nebula, also 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.. (Wikipedia)
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