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This ones a bit fainter Nick, the brightest part of the cloud is registering pixels at magnitude 20 - very close to what one might consider the background sky limit (though that mag 20 limit might be a stretch since it, Astrometrica, also registered my asteroid at magnitude 18.8 even though it really was 16.0).
I guess it just goes to show you can only stack so far :-)
Cheers
David
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