The Rosette Nebula is an emission nebula that lies about 5000 light years away in the constellation Monoceros. At the centre of the nebula lies the star cluster NGC 2244 which comprises massive O and B type stars that drive the stellar winds that have all but cleared the central region of gas and dust. These stars also provide the energy that excites the ring shaped emission cloud known as the Rosette Nebula.
Full Resolution: www.pbase.com/gailmarc/image/141710079/original
This is an LHaRGB image (60, 210, 60, 60, 60 minutes). All subs were unbinned. Ha, L and RGB subs were 30, 5 and 10 mins respectively.
FOV is 2.44 x 1.62 deg @ 2.21 arcsec/pixel.
Takahashi TOA-150 refractor @ F5.5 (FL=825mm) on a Paramount ME, SBIG STL 11000M camera and Takahashi 645 Super Reducer.