Celestial hemisphere:  Northern  ·  Constellation: Monoceros (Mon)  ·  Contains:  NGC 2239  ·  NGC 2244  ·  Rosette nebula  ·  The star 12Mon
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The Rosette Nebula - Caldwell 49 - NGC2244, Phil Swift
The Rosette Nebula - Caldwell 49 - NGC2244
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The Rosette Nebula - Caldwell 49 - NGC2244

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The Rosette Nebula - Caldwell 49 - NGC2244, Phil Swift
The Rosette Nebula - Caldwell 49 - NGC2244
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The Rosette Nebula - Caldwell 49 - NGC2244

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Description

The Rosette Nebula (Caldwell 49) is a large spherical HII region located at 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 around 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 producing the emission nebula we see.

The mass of the nebula is estimated to be around 10,000 solar masses.

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The Rosette Nebula - Caldwell 49 - NGC2244, Phil Swift