Rosette Nebula - RGB

Skull-shaped emission nebula in Monoceros with QuadBand filter

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Deep Space Capture

Technical Specifications

Resolution: 4102x2792

Integration: 270 subexposures × 300s, 22.5 hours total

Captured: January 25, 2023

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

Location: Backyard location during 18.19% moon phase

Processing Workflow

Total integration time: 22.5 hours

Altair QuadBand 2" filter for emission line enhancement

EdgeHD 8" telescope for high resolution detail

ZWO ASIAIR Plus automated control

Processed in PixInsight

Scientific Context

The Rosette Nebula (NGC 2237) is a large emission nebula in the constellation Monoceros. The nebula's distinctive circular shape with a central cavity gives it a skull-like appearance, earning it the nickname "Skull Nebula."

The central cavity was carved out by stellar winds from the hot O-type stars in the central cluster NGC 2244. These massive stars ionize the surrounding hydrogen gas, causing it to glow in the characteristic red color of hydrogen-alpha emission.