Leo kindly shared the images of the objects he could not identify. As there were slight inaccuracies in his measurements I have remeasured them. The observations and identifications are below. Leo's third unknown seems to match USA 161 [26934/01044A], last seen 290 days ago. Propagating the old elements forward and fitting the data allowing for changes in mean anomaly and RA of the ascending node yields this orbit: 1 26934U 01044A 14144.63398148 .00000000 00000-0 00000-0 0 02 2 26934 97.0335 276.7823 0001902 124.8490 48.3766 15.68826283 01 # 20140524.04-20140524.04, 7 measurements, 0.091 deg rms Fitting a circular orbit instead yields a much better fit but with a lower mean motion: 1 26934U 01044A 14144.03928469 .00000000 00000-0 50000-4 0 00 2 26934 96.9795 276.4708 0000000 0.0000 56.9491 15.60921888 07 # 20140524.04-20140524.04, 7 measurements, 0.006 deg rms It may be worthwhile to search for USA 161 using both orbits. Regards, Cees 37814 11 050B 4172 G 20140523235856313 17 25 2358170+572006 37 S 37814 11 050B 4172 G 20140523235858060 17 25 0003209+573488 37 S 37814 11 050B 4172 G 20140523235900061 17 25 0008970+575059 37 S 37814 11 050B 4172 G 20140523235902685 17 25 0016738+580928 37 S 37814 11 050B 4172 G 20140523235905580 17 25 0025133+582746 37 S 37814 11 050B 4172 G 20140523235907980 17 25 0032088+584061 37 S 37814 11 050B 4172 G 20140523235909902 17 25 0037661+584990 37 S 20642 90 050E 4172 G 20140524005217473 17 25 0130774+602748 37 S 20642 90 050E 4172 G 20140524005219924 17 25 0130582+595630 37 S 20642 90 050E 4172 G 20140524005222993 17 25 0130541+591804 37 S 20642 90 050E 4172 G 20140524005227283 17 25 0130254+582579 37 S 20642 90 050E 4172 G 20140524005229838 17 25 0130121+575548 37 S 20642 90 050E 4172 G 20140524005232795 17 25 0130118+572083 37 S 26934 01 044A 4172 G 20140524005630108 17 25 0051553+574211 37 S 26934 01 044A 4172 G 20140524005630790 17 25 0054342+574967 37 S 26934 01 044A 4172 G 20140524005631959 17 25 0059315+580206 37 S 26934 01 044A 4172 G 20140524005633567 17 25 0105964+581786 37 S 26934 01 044A 4172 G 20140524005635058 17 25 0112071+583094 37 S 26934 01 044A 4172 G 20140524005636517 17 25 0118052+584251 37 S 26934 01 044A 4172 G 20140524005638287 17 25 0125280+585488 37 S _______________________________________________ Seesat-l mailing list http://mailman.satobs.org/mailman/listinfo/seesat-lReceived on Sat May 24 2014 - 10:22:54 UTC
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