The Rosette Nebula (Caldwell 49 or NGC 2237) is a large, circular Hydrogen Alpha region located in the constellation Monoceros . Open cluster’s NGC 2244 (Caldwell 50) stars have been formed from the nebula’s matter.
The Rosette Nebula consists of 5 parts NGC 2237,NGC 2238,NGC 2239,NGC 2244,NGC 2246. The cluster and nebula are about 5,000 light-years from Earth and measure roughly 130 light years in diameter. The nebula is estimated to be around 10,000 solar masses.
Guiding-Starlight Express OAG,QHY5L-II & Phd
R- 7×10 minutes
Ha-3×20 minutes(as green)
OIII-3×20 minutes(as blue)
SII-3×20 minutes(as red)
RGB version: www.flickr.com/photos/astrochuck/11611047686/