TITLE: GCN GRB OBSERVATION REPORT NUMBER: 482 SUBJECT: GRB 991217 DATE: 99/12/18 01:50:10 GMT FROM: Arne A. Henden at USNO/USRA A. Henden (USRA/USNO) reports that there is an asteroid currently moving through the SAX error box, about two arcmin south of the center, in an easterly direction. Short exposures might confuse the naive observer into thinking a new object is present.