David Brierley, Russell Eberst, Greg Roberts, Viktor Voropaev and Peter Wakelin contributed observations used in the following updates. The line following each element set states the duration of the underlying observational period, or "arc", and the WRMS (weighted root mean square) residuals between the orbit and the observations; the smaller the value, the better. Description of 2-line elements: http://www.satobs.org/element.html Vortex 4 31294 X 40283 km 1 14675U 84009A 09096.43786283 .00000000 00000-0 00000-0 0 02 2 14675 7.6674 356.4688 1065822 287.7402 60.9073 1.00268784 00 Arc 2009 Mar 28.75 - Apr 06.77, WRMS residuals = 0.003 deg Vortex 6 31771 X 39825 km 1 19976U 89035A 09096.35880979 .00000000 00000-0 00000-0 0 03 2 19976 5.8638 11.9619 0954802 221.3536 130.9867 1.00235833 00 Arc 2009 Mar 13.83 - Apr 06.80, WRMS residuals = 0.004 deg Lacrosse 2 635 X 645 km 1 21147U 91017A 09097.12006851 .00000050 00000-0 72132-5 0 09 2 21147 67.9810 215.0773 0006973 235.5131 124.5343 14.76146835 05 Arc 2009 Apr 05.10 - 07.13, WRMS residuals = 0.023 deg Lacrosse 2 decreased its altitude slightly, sometime between 2009 Mar 09 and Apr 05 UTC, perhaps the result of momentum wheel unloading. SDS 3-2 35744 X 35833 km 1 26635U 00080A 09096.61090689 .00000000 00000-0 00000-0 0 06 2 26635 2.7930 44.7988 0010464 130.5762 229.6623 1.00269000 02 Arc 2009 Apr 06.76 (several minutes) USA 171 r 35484 X 35768 km 1 27938U 03041B 09095.83896356 .00000000 00000-0 00000-0 0 01 2 27938 4.1510 161.2928 0033778 244.9199 114.9557 1.00850891 01 Arc 2009 Mar 12.81 - Apr 06.78, WRMS residuals = 0.004 deg USA 202 35734 X 35835 km 1 33490U 09001A 09096.26202579 .00000000 00000-0 00000-0 0 09 2 33490 2.8938 338.8211 0011943 96.5189 263.3210 1.00281897 06 Arc 2009 Mar 29.81 - Apr 06.81, WRMS residuals = 0.009 deg USA 202 r 35942 X 38082 km 1 33491U 09001B 09096.41169220 .00000000 00000-0 00000-0 0 02 2 33491 2.9068 335.5267 0246626 12.9425 347.6802 0.96056520 00 Arc 2009 Apr 01.77 - 06.75, WRMS residuals = 0.002 deg 96576A 31917 X 40032 km 1 96076U 96576A 09096.48965012 .00000000 00000-0 00000-0 0 03 2 96076 7.7055 351.4354 0958077 15.3942 347.2612 0.99608128 07 Arc 2008 Oct 28.14 - Apr 06.77, WRMS residuals = 0.003 deg Ted Molczan ------------------------------------------------------------------------- Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive: http://www.satobs.org/seesat/seesatindex.html
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