Celestial hemisphere:  Northern  ·  Constellation: Monoceros (Mon)  ·  Contains:  NGC 2239  ·  NGC 2244  ·  Rosette nebula  ·  The star 12Mon
The Rosette Nebula, Lee Harris
The Rosette Nebula
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The Rosette Nebula

Acquisition type: Electronically-Assisted Astronomy (EAA, e.g. based on a live video feed)
The Rosette Nebula, Lee Harris
The Rosette Nebula
Powered byPixInsight

The Rosette Nebula

Acquisition type: Electronically-Assisted Astronomy (EAA, e.g. based on a live video feed)

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Description

The Rosette Nebula (also known as Caldwell 49) is a large spherical H II region (circular in appearance) 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 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.

60 second exposure for five and a half hours. Altair Hypercam 183C, Unity Gain 420, Skywatcher 102 F5 Refactor on EQ3 goto permanent pier, edited with Pixinsight and Photoshop, using the new L-Enhance Filter from Optilong

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The Rosette Nebula, Lee Harris