Greg Roberts wrote: > (2) USA 129 NOT seen on two good passes - possibly been de-orbited ???? I now suspect it was re-boosted hours before you last observed it, on Jan 27 UTC. Here are search elements based on manoeuvres at perigee, near the beginning, middle and end of the most likely span during which the re-boost would have occurred. A synthetic observation was generated at manoeuvre perigee and combined with your observations. Epochs are ascending node prior to your observations. Manoeuvre at 08:20:33 UTC 307 X 751 km 1 70001U 14027.77765526 .00015514 00000-0 24929-3 0 05 2 70001 97.5637 83.3493 0321300 181.9039 178.0996 15.11478138 06 Manoeuvre at 13:06:01 UTC 307 X 759 km 1 70002U 14027.77762216 .00015355 00000-0 24929-3 0 02 2 70002 97.5847 83.3491 0327076 181.9040 178.0972 15.10126892 06 Manoeuvre at 17:51:29 UTC 307 X 814 km 1 70003U 14027.77739930 .00014397 00000-0 24929-3 0 05 2 70003 97.7244 83.3468 0365735 181.9048 178.0810 15.01092252 09 If it remains in orbit, then 70001 and 70002 probably are closest. It might be useful to check the above against the time span during which you watched for the object on Jan 30 UTC. Any TLE that yields a prediction within the span, can be excluded, since it should have been seen. Ted Molczan _______________________________________________ Seesat-l mailing list http://mailman.satobs.org/mailman/listinfo/seesat-lReceived on Sun Feb 02 2014 - 05:32:26 UTC
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