The Rosette Nebula (NGC 2237-2239)

All Images Copyright Steve Cannistra

Please click here for a higher resolution Canon 10D image.
Please click here for a composite between this image and my Ha  SXV-H9 image.

Magnitude:  4.8 (for NGC 2244 star cluster in center)
Size: 80' x 60'
Distance: 5500 light years
RA: 6h 31m
Dec: 4 degrees 57' 00"

The Rosette Nebula is a winter showpiece for astrophotographers, as well as for visual observers at low power.  This large emission nebula is located in Monoceros and can be seen in dark locations with the naked eye, especially if viewed through a UHC filter held up to the sky.  The nebula actually consists of several sections (NGC 2237-2239), with a central ladder like star formation known as NGC 2244.  The central stars are young and newly-formed, and their radiation is responsible for excitation of hydrogen atoms within the nebula itself, which in turn emit light in the red.   Make sure to check out the
composite between this image and my Ha  SXV-H9 image.

Photographic Details:

Date:  November 22, 2003
Scope:  Takahashi Sky 90 at f4.5 with field flattener/focal reducer, piggybacked on LX90 (which is mounted on a Meade Superwedge).
Autoguider:  STV with e-finder.
Camera:  Canon 10D.
Filter:  IDAS LPS.
Exposures:  16 x 5' at ISO 1600.
Conditions:  Temperature 35 degrees F; below average transparency; average seeing; very dewy; calm.
Raw conversion, adaptive dark frame calibration, alignment, min/max excluded averaging done in ImagesPlus; Levels, curves, and layer mask adjustments in Photoshop; final smoothing done in Pleiades SGBNR software.  Star shaping performed using the technique described by Matt BenDaniels.

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