Here's some observations of high-flying satellites, preceded with the Highfly predictions: 39.877 105.391 8950. Coal Creek Canyon 2000 17.0 20 1998 Mar 24/25 Tue eve/Wed morn UT Hr Mn Alt Azi Mag Hgt R A Dec Range 25035 97-68B Centaur 97 68B M 2.5 ELDY 7 M2 0 2 5 65 126 8.6 8765 8 38.6 23.1 9017 Tumbling mag. 10 to 7 with a period of about 1 second. 20040 Superbird A 89 41A M 4.0 ELDY 14 M2 -2 3 5 49 167 12.2 22331 8 46.5 -.1 23154 3 35 50 167 12.1 22331 9 16.6 .1 23146 With my 12" at 105x, magnitude 13 between flashes. I watched the flashes between 0310-0320; most were to magniutde 4 or 5, with one particularly bright flash to magniutde 3.5 at 0316 (seen at 1x). 10637 IUE 78 12A 7.5 M 3.5 ELDY 21 M2 -2 4 50 80 109 11.1 18691 10 47.1 35.6 18745 5 20 75 102 11.1 18841 11 39.8 35.2 18951 The neatest catch of the night - IUE = International Ultraviolet Explorer. Observed from 0450-0516 with the 12-inch at 105x. Mag. 13.5, flashing to mag. 11 or 11.5 with an interesting cycle: 3 flashes at approximately 1.1 second intervals, then skip the 4th flash, then 3 more flashes, etc. I timed 14 of these cycles (flash-flash-flash-no flash) in 60 sec., yielding a 4.3 second cycle, or a period of 1.1 seconds between individual flashes (2.2 seconds when it skips the flash). I would imagine that this object is four-sided with low reflectivity on one side for some reason, and is rotating once every 4.3 seconds. Cheers, Rich Keen Coal Creek