Russell Eberst and Mike Waterman contributed observations used to determine the following element sets. The following is a good representation of the orbit's recent history, but probably will result in late predictions tonight. STSS-ATRR r 132 X 271 km 1 34904U 09023B 09211.03342556 .04013894 00000-0 13889-3 0 09 2 34904 112.5165 116.7424 0105001 226.7294 132.5108 16.25984734 321 Arc 20090728.08-0730.05 WRMS resid 0.240 totl 0.063 xtrk Using Satevo 0.51, I estimate decay tomorrow (July 31), before 10 UTC. For tonight's first pass over Western Europe, I offer a range of possibilities, generated using Satevo, based on various assumptions: #1 Decay Jul 21.40 1 34904U 09023B 09212.07583947 .10427059 00000-0 23880-3 0 90005 2 34904 112.5123 120.3318 0056196 225.4787 134.0608 16.38383338 498 #2 Decay Jul 21.39 1 34904U 09023B 09212.07491364 .12900995 00000-0 19071-3 0 90000 2 34904 112.5112 120.3360 0053917 225.4770 134.0812 16.41676841 498 #3 Decay Jul 21.21 1 34904U 09023B 09212.07397620 .23527722 00000-0 23427-3 0 90005 2 34904 112.5095 120.3404 0040380 225.4753 134.1939 16.46744870 492 Relative the historical epoch 09211 elset, elset #1 is about 1 min earlier, #2 is about 2.5 min earlier, and #3 is about 4 min earlier. Observers near 55 N have a fairly good view of the orbit; observers near 50 N have somewhat more challenging passes, in terms of illuminated elevation and phase angle. Ted Molczan ------------------------------------------------------------------------- Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive: http://www.satobs.org/seesat/seesatindex.html
This archive was generated by hypermail 2b29 : Thu Jul 30 2009 - 14:18:30 UTC