The Rosette Nebula in Monoceros (NGC 2237)
Combining images from narrowband filters is often done using the Hubble tri-colour palette, in which SII, Ha, and OIII are assigned to R, G, and B, respectively. I took this image in 2006 with 20 minutes exposure per filter from a remote access observatory in New Mexico.
Another technique adopted by the Canadian-France-Hawaii Telescope team (CFHT) is the sequence Ha, OIII, and SII (for R, G, B, respectively). A third technique, steadily increasing in popularity, is one where Ha, SII and OIII are assigned to R, G and B.
Return to Short Projects and Targets of Opportunity
In collaboration with the Remote Astronomical Society Observatory
Martin Nicholson - Daventry, United Kingdom.
This page was last updated on October 5th 2008.