On Monday evening I observed this VERY fast-moving object. Actually, I was lucky to have caught sight of it, because it was approximately 50 seconds EARLY, according to the prediction generated by SatSpy v2.5 (3/16/98 19:49:56). If I am correct, my elset is only a few days old. Can someone help me understand what has caused the error in the prediction? Iridm 15 Dlt r 1 24874U 97034F 98071.68636191 .00452083 00000-0 77857-3 0 2614 2 24874 82.7069 294.2950 0091361 155.6367 204.9969 15.94758062 38325 Thanks, Gregory May Rubbermaid MIS tandemcaptain@worldnet.att.net