Thanks Dunk. I would have spent more time on it, except for the blown out stars and other acquisition faults. A scan around the edges of the image tells the tale.
EDIT: uploaded a screen shot of the 14mb tiff file converted to jpeg. The first image was badly compressed and very messy. Hopefully this one is a better example of the issues.
http://www.iceinspace.com.au/forum/a...e.php?a=187895