wow pretty deep eh! a bit to deep for something moving that fast methinks, must of added deeper shots of area to stack? something funny about the brown ring around the ring neb itself? 'tis a little trickery/magic going on there
take a look at a QT movie by Jeff Terry (U.S) (all mac too
) of said fragment moving away from ring - check out progress over around an hour and a half!! wo-wo-woah - something Hyakutake-like about that apparent speed/proximity
http://mrmac.mr.aps.anl.gov/~astronu...s/cometM57.htm
Note: MOV loads at bottom of page
Love the pic on the front page of those two guys in the U.S. site you linked
http://www.masil-astro-imaging.com/home.html