| Proper Name | Rosette Nebula | | Caldwell Number | C49 | | NGC/IC Numbers | NGC 2237, NGC 2238, NGC 2239, NGC 2246 | | Constellation | Monoceros | | Right Ascension | 6h 31m 40s | | Declination | +4° 57' 48" | | Distance | c. 5,100 light years
c. 1,560 parsecs | | Magnitude | Apparent: +5.50
Absolute: -5.47 | | Mean Diameter | Apparent: 1° 54'
Actual: c.90 light years | | Associated Star(s) | Open cluster C50, the Rosette Cluster | | Optimum Visibility | January | | Notes | A cloud of ionised hydrogen more than a hundred light years across with the characteristic red-pink colour of an H II region. In the centre of the nebula, pressure from the Rosette Cluster, C50, has created a darker region some thirty light years across, adding to the overall impression of a rosette shape. |
A roughly spherical nebula in the constellation of Monoceros. It is a rich
red-pink in colour, hence its name, and surrounds a young cluster of stars
some 5,100 light years from Earth.
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