The initial set of bright flashes were seen at about 02:28 UT (18 Feb 97). The first recorded flash was at 02:28:14.14 UT. The ramp up in brightness was relatively quick. within two minutes, I was able to discern brightness differences bewteen the flashes (11.7 sec spacing). The flashes starting at 02:30:26.6 (and at 23.4 sec intervals) until 02:33:33.67 were brighter than the flashes before. Took about 20 seconds to try to see it visually. Gibbous moon impacted attempt but will assume from negative sighting that the maximum magnitude is in the 4th magnitude range. After resuming telescopic obs, I noted that flashes at 02:36:05.72, 02:36:29.13 and 02:36:52.5 UT were brighter than the ones before (11.7 seconds earlier). This is indicative (I assume) of a shifting in the solar array reflecting more light. My best determination of a period during these obs is 23.39 +/- 0.01 second. the 11.7 sec flashes continued until about 02:38:49.54 UT when I observed 4 flashes at 23.4 seconds. Four flashes at 11.7 seconds then some periods of invisiblility. at 02:46:02.0 UT i resumed flashes at 23.4 second intervals.