The Orion Nebula

M42/43. The Orion nebula. This selection of images was taken using a composition of RGB filters combined with narrow band filters: HA, S11 and O111. The colours consists of green for the H Alpha channel , red for the S11 channel and blue for the O111 channel . I was using my ten inch reflector , PHD auto guiding and an Atik 383L mono CCD camera. I combined the data with matching dark frames and flat field frames to reduce the effect of vignetting in the final image . I also used a composition of exposure times to reveal the nebula's outer and core regions, using sixty second and five minute sub frames combined. The total exposure times were 30 minutes for each RGB colour channel and 40 minutes for each narrow band channel.

RGB

RGB colour, narrowband luminance

Mapped colour plus RGB

Mapped Hubble palette