Thanks Scott,
Ian, the diffraction spikes are from the RC12. You might be thinking that I am only using a refractor, but I have two systems. If this is not your thinking can you elucidate your question a little please?
Quote:
Originally Posted by Ryderscope
Nice, smooth data with little noise for 8 hours looking at this image on my iPad. Is the blue/ green of the "face mask" OIII data? Fascinating sharp transition between there and the surrounding nebulosity.
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Rodney the OIII data and the Ha data are probably contributing to the blue green colour. I have mapped SII to red, Ha to green and OIII to blue. It's a fascinating object altogether in my opinion, but the boundary/gas wall is present in all channels. I think the wall is being illuminated by stars from behind the edge which are hidden from view. Though I could be completely wrong and would be pleased to here from anyone that actually does know.