Jeff Hooton
Astrophotography /Monoceros /Feb 2026

NGC 2237

Rosette Nebula · Emission nebula + open cluster · HOO

~11h total
Antlia ALP-T
Columbus, OH · Bortle 5
NGC 2237, Rosette Nebula, a emission nebula + open cluster in Monoceros

The target

A 130-light-year-wide cloud of hydrogen with an open cluster blown through its middle. The cluster (NGC 2244) is what's ionizing it.

Processing

  1. Stacked in PixInsight (WBPP) with calibration frames
  2. StarXTerminator star removal
  3. BlurXTerminator deconvolution
  4. NoiseXTerminator noise reduction

Acquisition

TypeEmission nebula + open cluster
ConstellationMonoceros
Distance5,200 ly
Apparent magnitude+6.0
Apparent size80' × 80'
Integration~11h
PaletteHOO
FiltersAntlia ALP-T
ShotFeb 2026
FromColumbus, OH · Bortle 5

Equipment

Telescope3D-printed 150mm f/5 Newtonian astrograph
CameraASI533MC Pro
MountProxisky Umis20s
FiltersAntlia ALP-T
GuidingSVBony 60mm guide scope · 22mm mini guide cam · PHD2