NGC 2244 / Caldwell 49 (Rosette Nebula) · January 18, 2026 · Backyard, Bortle 6
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.
Gear
scope Askar FRA400 camera ZWO ASI2600MM Pro mount ZWO AM5N guiding ZWO ASI220MM Mini + OAG filters Antlia 3nm Ha, OIII, SII
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.