s.ketch: Pretty cool stuff. I am also an enthusiastic sky watcher. When I was a kid I wanted to be an astronomer, but I am way too dumb for it, I fear. :-) Carl Sagan was nevertheless one of my first great heroes (and in fact remains so to this day).
I think I have seen the space station on occasion. Can't be absolutely sure, but I guessed it must be the space station simply because it was much brighter than any other satellite.