"George Evans" wrote in message
...
I just made a naked eye observation of ISS and Shuttle pass. My location is
in Southern California. ISS was steady, Atlantis "appeared" to be tumbling
with two regular flashes with a period of about a second.

What could cause this?

George Evans

Better conditions tomorrow morning for those us in in So Cal looking to view
ISS thursday 6:11 am, will be higher up in the sky 61 degs, as compared to
11 degrees this morn... unfortunatly Atlantis will already have landed by
then...