Hi SeeSater's, Thanks to a spell of mainly clear skies over the last few days I've been able to measure the flash period of the bright geoflasher Gorizont 23 on a daily basis; 91- 46 A 98-05-07 21:20 JPH 599.2 0.2 12 49.93 A'A' mag+5->inv 91- 46 A 98-05-08 21:10:53.8 JPH 998.9 0.1 20 49.94 A'A' mag+5.7->inv 91- 46 A 98-05-09 22:15 JPH1448.4 0.1 29 49.95 A'A' mag+6->inv 91- 46 A 98-05-10 22:24:30 JPH 999.2 0.1 20 49.96 A'A' 91- 46 A 98-05-11 20:48:49 JPH1548.7 0.1 31 49.956 A'A' 91- 46 A 98-05-12 21:05:48 JPH1748.9 0.1 35 49.968 A'A' These observations show that the flash period appears to have increased over the last few days, although maybe not at a constant rate; Kurt Jonhkeere's obs. 98-05-04 = 49.908 +/- 0.004 My obs. 98-05-07 = 49.933 +/- 0.016 98-05-08 = 49.945 +/- 0.005 98-05-09 = 49.945 +/- 0.007 98-05-10 = 49.960 +/- 0.005 98-05-11 = 49.956 +/- 0.003 98-05-12 = 49.968 +/- 0.003 A few other interesting recent observations concerning Centaur rockets. I discovered a new flashing Centaur, the Atlas I Galaxy 5 rocket (92-013B). Flashing with a period of 18 sec, with bright, mag +7 flashes at a range of over 30,000km; 92- 13 B 98-05-10 20:56:14.7 JPH 671.0 0.2 37 18.13 F'F' vm mag+7->inv Most other Atlas Centaurs & Atlas I Centaur's seem to flash brightly enough to be spotted out to maximum range (approx. 37,000km), such as the ATS-5 rocket flashing as brightly as mag +8. One of the prettiest is the Intelsat 4-4 rocket (72-003B) with a rapid flash period of 1.526s. This is perhaps a nice object for a star party, when EGP isn't visible, since at moderate ranges it is relatively bright moves quite slowly though a telescopic field of view. At the other extreme is the Atlas Centaur 75-042B which was quite a challenge to observe & follow, invisible except for relatively bright flashes every 209s... Best wishes & clear skies, Jason -- Jason P Hatton INSERM U311 ETS Strasbourg 67065 Strasbourg Cedex France 48.538N / 7.731E / 143m