Flare-watchers - Certainly not having an Iridium Flare drought here in Colorado, USA! Here's the Iridflar (verson 1.5) output, with my estimated magnitudes following: Ir Date Time Az El Range Sun Flare Vis Peak Std Obs MST(UT-7) km elev Angle Mag Mag Mag Mag 38 98-2-22 19:46:53 017 27 1433 -23.4 0.87 -0.4 -7.3 -1.4 0 thru cloud 20 98-2-22 19:48:13 016 28 1424 -23.6 0.39 -3.2 -7.3 -4.2 -5 thru cloud 52 98-3-1 5:02:30 193 43 913 -18.0 0.00 -8.3 -8.3 -8.3 3 10 98-3-1 5:09:30 202 37 1182 -16.6 6.30 4.1 -7.8 3.7 4 11 98-3-1 17:36:55 221 33 1248 2.5 0.28 -4.5 -6.8 -6.0 not visible 21 98-3-1 18:51:13 014 50 804 -11.3 0.27 -6.4 -8.5 -6.2 not visible 20 98-3-1 19:13:59 015 41 1113 -15.7 0.60 -2.1 -7.8 -2.5 -4 39 98-3-2 19:07:47 013 43 1082 -14.6 0.10 -7.8 -7.9 -8.2 -6 thru Cirrus 9 98-3-3 17:05:48 343 80 789 8.6 0.04 -8.3 -8.3 -8.3 -7 naked eye I just observed the last flare a few minutes ago, and by lining up the predicted position with a point on the roof edge and lying down on the deck, it was easy to spot. It was only visible for about 2 seconds. Note that some of predicted flares were way off on magnitude. In particular, the predicted mag. -8 flare of Iridium 52 could only must mag. +4, but that's probably because I was using 2-day-old elements and the object is still rising to it's final orbit. Then there's the "rogue" objects, Iridiums 11 and 21. I think I should have able to spot the mag. -4.5 Iridium 11 flare with 7x50 binoculars, despite the sun being just above the horizon. Meanwhile, nothing was visible of the predicted mag. -6 Iridium 21 flare! I think one may conclude that Iridium objects that have reached their final orbit, with Mean Motion of 14.342, should be reliably predictable, while other objects are either being moved to that final orbit, or are having other problems. So, from Mike McCant's CS980226 file, here's a list of Iridium satellites with Mean Motions NOT 14.342: Iridium Epoch Mean Motion Ir 24 98057 14.337 Ir 5 98056 14.370 Ir 18 98057 14.370 Ir 48 98057 14.371 Ir 38 98057 14.372 Ir 42 98057 14.375 Ir 11* 98057 14.391 Ir 50 98057 14.508 Ir 56 98056 14.532 Ir 53 98057 14.538 Ir 54 98057 14.682 Ir 52* 98057 14.738 Ir 21* 98057 14.780 Ir 27 98057 15.039 Cheers, Rich Keen Coal Creek Canyon, Colorado, USA (39.877 N, 105.391 W, elevation 2728m)