Captured using Astro IIDC with Point Grey 1.4mp Scorpion Monochrome camera on rear port (prime focus) of ETX-125 f/15 Maksutov-Cassegrain telescope polar aligned November 9, 2009 at about 2am. 38 of 465 frames. Registax 5 lets you limit your stack based on quality; these frames were 85% or better.
I export avi from Astro IIDC to process in Registax. There’s a 4Gb limit on avi so I had to trim the original in Quicktime Player before exporting. The best Copernicus I’ve done.