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The Rosette Nebula (also known as Caldwell 49) is an 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.
NGC 2244 (also known as Caldwell 50 or the Satellite Cluster) is an open cluster in the Rosette Nebula, which is located in the constellation Monoceros. This cluster has several O-type stars, super hot stars that generate large amounts of radiation and stellar wind. The age of this cluster has been estimated to be less than 5 million years.
Part of another diffuse nebula IC 4703. Rosette Nebula: 130 ly (40 pc) [59] H II region: Only 36 stars were known to be in this nebula but the Chandra telescope increased the number of known stars to 160. Lagoon Nebula: 110 ly (34 pc) [60] H II region: Veil Nebula: 100–130 ly (31–40 pc) [61] Supernova remnant: Located in the Cygnus Loop ...
The Rosette Nebula (NGC 2237, 2238, 2239, and 2246) is a diffuse nebula in Monoceros. It has an overall magnitude of 6.0 and is 4900 light-years from Earth. The Rosette Nebula, over 100 light-years in diameter, has an associated star cluster and possesses many Bok globules in its dark areas.
It is similar in structure to the more famous Rosette Nebula. [4] [5] [6] It is part of a large region of stars called LMC-N11 (N11) which was discovered with a 23-cm telescope by the astronomer James Dunlop in 1826 and was also observed by John Herschel in 1835. [3]
The Rosette Nebula, an example of a Strömgren sphere In theoretical astrophysics , there can be a sphere of ionized hydrogen (H II) around a young star of the spectral classes O or B . The theory was derived by Bengt Strömgren in 1937 and later named Strömgren sphere after him.
The Rosette Nebula is an example of an unusual shape that an elephant trunk can assume. It has a double helix structure instead of the normal straight column. [ 10 ] The double helix is caused by the presence of magnetic fields and electric currents lined up along the trunk axis of the trunks.
NGC 2244 – The open cluster in the center of the nebula (Discovered by John Flamsteed in 1690) [citation needed] NGC 2246 – Part of the nebulous region ^ a b "NGC 2237" .