Cees Bassa wrote: > Two unknowns were seen. Fitting a circular orbit to the 99603/21759A > observations yields an altitude of 622 km at 97.88 degrees. For > 99604/21759B a circular orbit yields 590 km at 54.99 deg. I have not > yet checked if these match recent classified launches. > 99604 21 759B 4171 G 20210916191229796 17 25 0036656+424158 37 S > 99604 21 759B 4171 G 20210916191232855 17 25 0040159+415638 37 S > 99604 21 759B 4171 G 20210916191234515 17 25 0041972+413228 37 S > 99604 21 759B 4171 G 20210916191235775 17 25 0043328+411393 37 S The orbit of the second object correlates with the following launch: USA 316 2021-052A 48846 USA 317 2021-052B 48847 USA 318 2021-052C 48848 MINOTAUR 1 R/B 2021-052D 48849 Here is a zero-decay rate guess that fits the observations and passes the launch site several minutes after lift-off, which occurred on 2021 Jun 15 at 13:35 UTC. 600 X 602 km 1 99604U 21759B 21259.80034486 .00000000 00000-0 00000-0 0 07 2 99604 55.0000 219.9570 0001000 0.0000 84.1413 14.89050000 02 Here is a high-drag alternative: 597 X 599 km 1 99604U 21759B 21259.80034486 .00010230 00000-0 10500-2 0 01 2 99604 55.0000 219.9932 0001000 0.0000 84.0951 14.90000000 07 Ted Molczan _______________________________________________ Seesat-l mailing list http://mailman.satobs.org/mailman/listinfo/seesat-lReceived on Fri Sep 17 2021 - 09:00:14 UTC
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