I have now made 6 nights' worth of Superbird A flash period observations. This consists of 197 timings spanning a total of 38.5 minutes of observing time. The average flash period based on these obs is 11.6982 seconds. There seems to be a trend towards an increase in flash period, but will need more obs to confirm. Each night's measured period, based on no fewer than 31 observations per night: Date(UT) Period(sec) -- --- 9/29 11.6964 10/3 11.6965 10/4 11.6971 10/6 11.6948 10/7 11.7000 10/8 11.7045 ------------------------------------------------------------------------------ Jim Varney | 121^ 23' 54" W, 38^ 27' 28" N | Sacramento, CA Member, SeeSat-L | Elev. 31 ft. | Member, Sacramento Valley Astronomical Society |jvarney@mail2.quiknet.com ------------------------------------------------------------------------------