The Rosette nebula

The Rosette nebula, in Monoceros, is one of my favorite objects to observe and image. This is an S-H-O image of the nebula, with R-G-B used only for the stars.

The Rosette Nebula, Caldwell 49, NGC 2237, is a large spherical H-II region located near one end of a giant molecular cloud in the Monoceros region of the Milky Way Galaxy. The open cluster NGC 2244 (Caldwell 50) is closely associated with the nebulosity, the stars of the cluster having been formed from the nebula's matter.
The cluster and nebula are 5,000 light-years from Earth and measure roughly 130 light years in diameter. The radiation from the young stars excites the atoms in the nebula, causing them to emit radiation themselves producing the emission nebula we see. The mass of the nebula is estimated to be around 10,000 solar masses.

Included in the image are NGC 2239, NGC 2244, NGC 2246 and NGC 2252

William Optics FLT-91mm triplet apo refractor
William Optics Flat 6AIII, which reduces the telescope to f/4.7, 432mm focal length
ZWO ASI 294MM Pro camera, Cooled to -10C
Sky-Watcher EQ6-R Pro equatorial mount

- Antlia Edge 4.5nm Ha filter, 35 x 4 minutes
- Antlia Edge 4.5nm OIII filter, 32 x 4 minutes
- Antlia Edge 4.5nm SII filter, 32 x 4 minutes
- Baader CMOS optimized Red filter, 12 x 1 minute
- Baader CMOS optimized Green filter, 20 x 1 minute
- Baader CMOS optimized Blue filter, 20 x 1 minute
30 dark frames, 25 flats and 25 dark-flats for each filter
Processed in PixInsight