NGC2244, the Rosette nebula. This bright patch of nebulosity lies in the constellation of Monoceros. I was using my 4 inch f/6.3 refractor, a Vixen Atlux mount PHD auto guiding, a set of Astronomik RGB and narrowband filters and an Atik 383L mono CCD camera, I captured five minute sub frames with matching dark frames and combined them with flat field and bias frames to reduce the effect of noise and vignetting in the final image. The total exposure time of each filter was 60 minutes using a H Alpha filter, 30 minutes using an O111 filter, 30 minutes using an S11 filter and five minutes for each RGB filter.
RGB image
Bi colour image
Hubble palette
