The Rosette Nebula is 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 starsof the cluster having been formed from the nebula’s matter.
The cluster and nebula lie at a distance of some 5,200 light-years from Earth (although estimates of the distance vary considerably, down to 4,900 light-years.) and measure roughly 130 light years in diameter. The radiation from the young stars excite 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.

Imaging telescopes or lenses: PlaneWave Instruments Planewave 20″ CDK
Mounts: Planewave Instruments Ascension 200HR
Resolution: 3056×3056
Dates: Dec. 5, 2013
Frames:
Astrodon Red G2E: 3×600″ bin 1×1
Astrodon Blue: 3×600″ bin 1×1
Astrodon Green: 3×600″ bin 1×1
Astrodon Ha: 9×600″ bin 1×1
Astrodon Luminance: 6×600″ bin 1×1

Autor: Federico Pelliccia

AstroPhotography of the day by SPONLI
December 07, 2013
We select the best works of amateur astrophotographers with details of equipment, shooting processing etc.