Calsky (http://www.calsky.com) offers a free service that will send you email alerts when ISS, STS or other large satellites will be passing in front of or near the Sun or Moon as seen from the location you specify. They also alert about Iridium flares and decaying satellites. patrick p.s. STS just launched a few minutes ago. But since it's headed for HST sightings from N. Utah will not be very high in the sky. On 11 May 2009, at 05:42, jim Gibson wrote:

I missed a good opportunity to get a shot of IIS this morning. I checked the schedule and it was due to appear at 5:26 am in the west. I went outside and there were high thin clouds and the moon was south-south-west and near full so I decided not to set up my camera but just to watch it. IIS appeared right on schedule. To the unaided eye it could have been mistaken for a jet liner. I was able to follow it with my 15X70 Galileo’s. It looked really cool. From my location IIS passed just arc-minutes above the moon. It would have been a nice shot. It seems to be the story of my life; I see a lot of neat shots get away as I stand unprepared with my jaw hanging down.

Jim