|BrewSky Observatory, Casa Grande, AZ|
|Takahashi Sky90 on Paramount, SBig ST2000XM Camera/Filter Wheel
|This version uses only RGB exposures (Synthetic Lum by integrating RGB).
Reduced in Maxim
Aligned/Stacked/Processed in PixInsight
|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)|