On 1999 March 11 I observed Superbird A flashes in 20x80 binoculars for about 10 minutes in a reasonably clear sky (limiting magnitude about +8.5). I timed a number of the flashes, the first at 03:25:44.75 UT, and the last at 03:34:48.07 UT. This gives a period of 11s.560 +/- 0.005. There appeared to be a relatively rapid rise to a max mag of about +4 at 03:27, followed by a slow fall - the last flash timed was about mag +7. However the satellite only emerged from shadow at 03:22 UT. David Brierley Malvern, Worcestershire, UK Station 2675, 52.1358N, 2.3264W, 70m