Iris Nebula (NGC 7023) - RGB

Blue reflection nebula in Cepheus with QuadBand filter

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Deep Space Capture

Technical Specifications

Resolution: 3948x2648

Integration: QuadBand filtered RGB

Captured: Backyard capture

Equipment: Celestron EdgeHD 8" with ZWO ASI294MC camera on iOptron CEM70 mount

Location: Backyard location

Processing Workflow

Altair QuadBand 2" filter for efficient capture

EdgeHD 8" telescope for detailed resolution

ZWO ASIAIR Plus automated control

RGB processing emphasizing blue reflection

Scientific Context

The Iris Nebula (NGC 7023) is a bright reflection nebula in the constellation Cepheus. Unlike emission nebulae that glow from ionized gas, reflection nebulae shine by reflecting and scattering light from nearby stars. The characteristic blue color comes from the preferential scattering of blue light by dust particles.

The central star illuminating the nebula is surrounded by a complex structure of dust lanes and reflection regions, creating the flower-like appearance that gives the nebula its name.