Tuesday 25 October 2016

NGC7635 The Bubble Nebula.

NGC7635 The Bubble Nebula.
This image of NGC7635 was taken using my ten inch F4.8 reflector, an Atik 383L mono CCD camera with PHD auto guiding. I used five minute sub frames with matching dark frames combined with flat field frames to reduce the effect of vignetting in the final image. I used the Hubble palette for the colour data using S11 for red H-Alpha for green and O111 for the blue. The total exposure times was sixty minutes for each filter.