Antonín Vítek asked: > Any guess for TLE on the first two orbits after launch, please? The objects will not be visible from Europe optically, but the payload may be heard on radio. I have estimated elements based on those of Soyuz TMA-5 (04040A / 28444), launched on 2004 Oct 14 at 03:06 UTC, obtained from Jonathan McDowell's archive: http://www.planet4589.org/space/elements/28400/S28444 http://www.planet4589.org/space/elements/28400/S28445 Rotating Soyuz TMA-5's epoch 04288.74409498 elset and its rocket's 04288.79749698 elset to the circumstances of the launch of Soyuz TMA-10, on 2007 Apr 07 at 17:31 UTC, yields: Soyuz TMA-10 89.26 X 232 X 244 1 73996U 73996A 07098.35902331 .00384271 88686-4 31737-3 0 66 2 73996 51.6363 110.1457 0009110 188.4052 198.5660 16.13260573 108 Soyuz TMA-10 r 88.43 X 189 X 205 1 73997U 73996B 07098.39819142 .05648187 12127-4 13571-2 0 97 2 73997 51.6567 104.7733 0012447 68.9169 291.3150 16.28462240 106 There is some variation among launches initial orbit and rendezvous manoeuvres, so the actual orbits may well differ from the above, which should only be taken as a rough guide. The rocket's orbit more or less defines the earliest time that the Soyuz my be heard. Ted Molczan ------------------------------------------------------------------------- Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive: http://www.satobs.org/seesat/seesatindex.html
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