Iris Nebula

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The Iris Nebula (NGC 7023) is a reflection nebula located approximately 1,300 light-years from Earth in the constellation Cepheus. Unlike emission nebulae that glow through ionized hydrogen, the Iris Nebula owes its striking blue appearance to microscopic dust particles reflecting the light of the young star HD 200775. The surrounding dark dust clouds are part of a much larger molecular cloud complex, making this region an important laboratory for studying the early stages of star formation and stellar evolution.

OBJECT INFORMATION

Name/DesignationNGC 7023 (Iris Nebula)
Object TypeReflection Nebula
ConstellationCepheus
Distance~1,300 light-years
Apparent Magnitude~6.8
Angular Size~18′ (~0.3°)

IMAGING

DateJuly 31 & August 2–3, 2022
LocationAegina, Greece
Frames437 × 60″ exposures
Integration7h 17m
Camera SettingsGain 101 | Temperature: 0°C
Bortle Scale4/5 (Rural sky)

EQUIPMENT

TelescopeSky-Watcher Explorer 130PDS
CameraZWO ASI533MC Pro
MountSky-Watcher EQ5 Pro
FilterBaader UV/IR Cut Luminance
AccessoryBaader 2″ MPCC Mark III
Guide ScopeArtesky 32mm Mini
Guide CameraZWO ASI120MM Mini

SOFTWARE

AcquisitionAstro Photography Tool
GuidingPHD2 Guiding
ProcessingPixInsight
PluginsRC Astro