I Timed flashes of this quasi geostationary flasher using 7x50 binoculars from 1235-1252UT on march 28, 1998. I got 5 sets of times for 4 periods. The result was a period of 84.92 seconds ( + or - 0.01 second). Peak brightness about mag 4. Peak shape asymmetric, with sharp rise and slower fall. Tony Beresford (34.97S, 138.6317E)