DSLR astrophotography by Sergi Verdugo
The Rosette Nebula
Exposure: 9×900″ @ ISO 800
Telescope: William Optics Megrez 88FD with Baader MPCC
Filter: Baader H-alpha 7nm 2″
Mount: Meade LXD-75 Autostar
Camera: Modded Canon 350D
Date: 5th January 2009
Location: Cabrera de Mar (suburban site near Barcelona)
Comments: Another Ha image from home still without a true flattener and using a coma corrector for Newtons instead.
The Rosette Nebula is a large, circular 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 is closely associated with the nebulosity, the stars of the cluster having been formed from the nebula’s matter.
The cluster and nebula lie at a distance of about 5200 light years from Earth (although estimates of the distance vary considerably) and measure roughly 130 light years in diameter. The radiation from the young stars excite the atoms in the nebula, causing them to emit radiation themselves producing the emission nebula we see.