Hello! Many thanks to all of you who responded so *quickly* to my request for information on predicting Iridium flares. Unfortunately, all of the programs mentioned are IBM based while all of the computers I have here at work, at the observatry and at home are Macs. However, included in a couple of the replies where URLs of places that do the predicting for you. Tried them out and have predictions for tomorrow morning. Weather permitting, I'll be watching. Thanks again! Patrick :-) -- Patrick Wiggins Hansen Planetarium Education Department email: p.wiggins@m.cc.utah.edu WWW: web.state.ut.us/bbs/space snail mail: 15 S. State St., SLC, UT 84111-1590 voice: 801.531-4952 fax: 801.531-4948