NGC 2244 Open Cluster in the Rosette Nebula

[Trev S]

Attached is my attempt at imaging NGC2244, the open star cluster in NGC2237, the Rosette Nebula in the constellation Monoceros. NGC2244 is visually uninspiring, but it consists of several K-class giants.

The brightest star in the direction of the cluster is 12 Monocerotis, a K-class giant. The two brightest members of the cluster are HD 46223 of spectral class O4V, 400,000 times brighter than the Sun, and approximately 50 times more massive, and HD 46150, whose spectral type is O5V, has a luminosity 450,000 time larger than that of our star, and is up to 60 times more massive than the Sun, but it may actually be a double star.

Imaged on the night 5th January 2026 from my back garden in Surrey

9.25 SCT with 0.63x flattener reducer

ZWO ASi1600-MM cooled to -10C

AZEQ6GT mount

Antlia filters

Ha (red) 10x300s

Sii (green) 10x300s

Oiii (blue) 10*300s

RGB (stars) 10*10s

SGPro for mount/camera control 

PHD2 guiding

PixInsight and PS2 processing

Thanks for looking