NGC 2244 / Caldwell 49 (Rosette Nebula) Backyard, Bortle 6 January 18, 2026
Rosette Nebula in narrowband
My first full SHO project. The Rosette is huge — almost three full moons across — and in narrowband those ionized gas clouds just pop. The open cluster at the center (NGC 2244) is what’s blasting the gas outward with its UV radiation.
Exposure · Sky
subs Ha 60×300s · OIII 60×300s · SII 40×300s total 13h 20m gain/temp 100 · −10°C bortle 6 ra / dec 06h 33m 45s / +04° 59′ 54″
Processing notes
SHO palette. Stacked in Siril, narrowband combination in PixInsight with NarrowbandNormalization.