Hmmmmm ... had a bit of a tussle with this one, striking the balance between noise reduction and maintaining detail. I opted to retain a bit more noise than usual (for me) so as not to eliminate the real detail. There is no sharpening on this image either - save for some contrast enhancement - so not too shabby for a 6" in Sydney I think.
Small:
http://www.pbase.com/gailmarc/image/119360007/large
Large:
http://www.pbase.com/gailmarc/image/119360007/original
It's a mere 7.75 hours of exposure so more data would help of course ... plus I think there is at least one "Sidonio" to do on it yet. In any case, I'm reasonably happy with the first cut. Hope you like it! (critique always welcome of course)
Cheers, Marcus