Decay update: 1998 Feb 24
Alan Pickup (alan@wingar.demon.co.uk)
Tue, 24 Feb 1998 23:35:40 +0000
Three reasonably large objects are close to decay, though the OIG feed
of recent elsets for them has been stalled since this morning. Also, it
is interesting to see that all should have re-entered by now according
to the latest GSFC Sixty Day Decay Forecast issued on February 20:
Cosmos 1043 on the 20th and the other two on the 22nd.
At the epoch to the latest elset for Cosmos 1043 ...
Cosmos 1043 5.0 1.5 0.0 5.4 v 214 x 208 km
1 11055U 78094A 98055.23942670 .01470449 -93038-6 60755-3 0 5384
2 11055 81.1345 69.9157 0004157 175.9538 184.1920 16.23219748 70597
it was running only 0.5 sec late on the "9525" SatEvo evolution I posted
earlier today. Decay about February 27.6 +-0.6d.
---------------------------
The latest elset on the decaying TRMM H-2 rocket is
TRMM H2 r2 13.5 2.5 0.0 4.2 v 250 x 235 km
1 25066U 97074D 98055.01287293 .02218289 48562-2 21243-2 0 1316
2 25066 34.9899 168.6154 0011244 52.8281 307.3498 16.11731044 13907
Decay may occur at about February 26.4 +-0.4d. Predicted elsets:
TRMM H2 r2 13.5 2.5 0.0 4.2 v 232 x 220 km
1 25066U 97074D 98056.00214100 .03802511 76145-2 21974-2 0 91319
2 25066 34.9886 161.4966 0008662 63.0639 297.0243 16.17645032 14064
TRMM H2 r2 13.5 2.5 0.0 4.2 v 224 x 214 km
1 25066U 97074D 98056.31044074 .04687266 11711-1 22221-2 0 91316
2 25066 34.9880 159.2637 0007681 66.2744 293.8059 16.20242484 14113
TRMM H2 r2 13.5 2.5 0.0 4.2 v 214 x 206 km
1 25066U 97074D 98056.61818471 .06143968 21196-1 22352-2 0 91310
2 25066 34.9873 157.0255 0006558 69.4927 290.5775 16.23531771 14164
TRMM H2 r2 13.5 2.5 0.0 4.2 v 201 x 194 km
1 25066U 97074D 98056.92519768 .09148402 50871-1 22378-2 0 91312
2 25066 34.9863 154.7802 0005202 72.7213 287.3356 16.28094509 14218
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Finally, OIG's latest on the Iridium 42 CZ-2C platform is
Irid 42 CZ plat 10.0 3.0 0.0 3.0 d 272 x 174 km
1 25080U 97077D 98055.22520983 .02169611 -14993-5 72457-3 0 1722
2 25080 86.1888 79.3174 0074038 208.0409 151.6898 16.18742261 12269
I predict decay at about February 27.1 +-0.4d. Prediction:
Irid 42 CZ plat 10.0 3.0 0.0 3.0 d 254 x 171 km
1 25080U 97077D 98056.02793989 .02785946 31203-2 75372-3 0 91721
2 25080 86.1874 78.8449 0062838 204.5656 155.1338 16.22728582 12390
Irid 42 CZ plat 10.0 3.0 0.0 3.0 d 240 x 168 km
1 25080U 97077D 98056.52087071 .03398603 54131-2 76818-3 0 91726
2 25080 86.1863 78.5531 0054839 202.4207 157.3387 16.25748256 12478
Irid 42 CZ plat 10.0 3.0 0.0 3.0 d 224 x 164 km
1 25080U 97077D 98057.01277701 .04523202 10715-1 78963-3 0 91720
2 25080 86.1849 78.2605 0045474 200.2700 159.5489 16.29581997 12557
Alan
--
Alan Pickup | COSPAR site 2707: 55d53m48.7s N 3d11m51.2s W 156m asl
Edinburgh | Home: alan@wingar.demon.co.uk +44 (0)131 477 9144
Scotland | SatEvo satellite page: http://www.wingar.demon.co.uk/satevo/