Greg Roberts wrote: > Unknown: > --------- > 91040 05 241LEO 0433 P 20050829171912300 17 15 1136599-285041 39 > 91040 05 241LEO 0433 P 20050829171913500 17 15 1137382-283451 39 > > Notes: > ------ > (2) A faint satellite was briefly observed for which I cannot find a > match in my elements database... Nice work Greg! This is the same UNID that you observed in late June, which I believe to be the rocket body of XSS-11: http://satobs.org/seesat/Jun-2005/0193.html Greg did not publish his three June positions in IOD format, so here they are, with the correct ID: 28637 05 011B 0433 G 20050621172709200 56 15 0704030-245747 39 +100 05 28637 05 011B 0433 G 20050621172710200 56 15 0704263-244701 39 +100 05 28637 05 011B 0433 G 20050621172711100 56 15 0704516-243549 39 +100 05 The following elset is in excellent agreement with Greg's positions of June 21 and August 29: XSS-11 r 1.3 1.1 0.0 7.6 v 1 28637U 05011B 05241.65828408 .00000180 00000-0 10000-3 0 02 2 28637 98.8460 233.3823 0015000 90.1679 270.1211 14.11054773 02 Rate of decay, eccentricity and argument of perigee are a guess. Due to the long arc, there is some ambiguity in the mean motion, so that too is a guess. A value of 14.096 rev/d yielded an equally good fit, and other similar values are possible. An additional accurate observation is required to resolve the ambiguity. The orbit always remains near the terminator, which makes it difficult to observe. Ted Molczan ------------------------------------------------------------------------- Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive: http://www.satobs.org/seesat/seesatindex.html
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