The Orbiter and the ISS undocked this morning, and will both make low-altitude passes over Arizona skies tonight. Heavens Above shows a maximum altitude of 12 degrees above the north-northeast horizon for Tempe for both craft. The Shuttle Orbiter passes over at 9:06:11 MST, and it followed by the ISS 18 seconds later at 9:06:29 MST. It looks like the prospects for seeing both in the sky at the same time are slim. Since the closest point on the ground track is in Colorado, the altitudes will be higher for those who live farther north or east in Arizona. Tom -- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list.