Mono Images - Barry Wilson
The Rosette Nebula, Caldwell 49

The Rosette Nebula, Caldwell 49

The Rosette Nebula, Caldwell 49, a large, circular 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 lie at a distance of some 5,000 light-years from Earth and measure roughly 50 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. Source Wikipedia.

I have captured 6 frames of 1200s Ha and 12 frames of 300s of each R, G and B using an Astrodon 5nm Narrow Band filter and RGB filters in this image. Ideally I would like to capture more data if weather allows, however, it may well be next year now.

Ha composition, total integration 2hrs, February 2016. Takahashi FSQ85 EDX at F3.9 - Avalon Linear Fast Reverse - QSI683-wsg - Astrodon 5nm NB filter.

Rosette NebulaCaldwell 49