NGC 2237 - Rosette Nebula (Gary Imm)

NGC 2237 - Rosette Nebula

This object consists of a central star cluster which has blown a large cavity into the surrounding molecular cloud. The star cluster is NGC 2244 (Caldwell 50) and the surrounding large emission nebula is NGC 2237 (Caldwell 49). The object, nicknamed the Rosette Nebula, is located 5000 light years away in the constellation of Monoceros at a declination of +5 degrees. The nebula is about 1.7 degrees in width and 150 light years in diameter.

The Rosette Nebula is the most famous example of a Strömgren sphere, where a sphere of ionized hydrogen (H II) stabilizes around a young star of the spectral classes O or B. The theory for these spheres was derived by Dr. Bengt Strömgren in 1937 and later named Strömgren sphere after him.

Numerous star-producing dark Bok globules are visible in the upper right central region of the nebula. This train of globules is known as the Circus Animal Parade, although the parade is upside down in my image. The globules are curving in various directions, but the windswept heads of all of them point back to the cluster center. Less developed globules, looking like puffy clouds, are seen on the opposite side of the central star cluster, towards the left. Also seen in this image are the bright whitish wisps of nebula arcs, seen most prominently just below and to the left of the central star cluster.

Most of the narrowband was captured under the current full moon. I was surprised that this setup performed fine under such bright light.

In 2019, Oklahoma made the Rosette Nebula its official state astronomical object. I am not exactly sure why states need official astronomy objects.

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Status	Advanced success
Started	...
Astrometry.net job	7130563
PixInsight job	KF8P0H6TUQVNOKTNY598949VTK02DRIF
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	06h32m03s.65
RA (top/left)	06h38m22s.100
RA (top/right)	06h25m54s.100
RA (bottom/right)	06h25m44s.61
RA (bottom/left)	06h38m10s.36

Dec (center)	+04°59′57″.6
Dec (top/left)	+06°01′45″.6
Dec (top/right)	+06°06′05″.9
Dec (bottom/right)	+03°57′55″.6
Dec (bottom/left)	+03°53′47″.5

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