Decay update: 1998 Feb 26

Alan Pickup (alan@wingar.demon.co.uk)
Thu, 26 Feb 1998 20:50:41 +0000

One down, two to go.

The latest and probably final elset on the TRMM H-2 rocket is
TRMM H2 r2      13.5  2.5  0.0  4.2 v            160 x 120 km
1 25066U 97074D   98057.41370285  .99999999  11652-5  10000-2 0  1453
2 25066  34.9614 151.2494 0030671 150.6649 209.6641 16.49659137 14286
This suggests that it was 36 seconds late on the final "9143" SatEvo
prediction I posted a few hours before. I suspect it decayed on this
rev, possibly near the next northbound equator crossing near 176 degrees
W longitude at 11:22 UTC (February 26.47).

              ---------------------------------

OIG's latest elset for Cosmos 1043 is:
Cosmos 1043      5.0  1.5  0.0  5.4 v            179 x 174 km
1 11055U 78094A   98057.75846285  .04440200 -91869-6  57308-3 0  5484
2 11055  81.1324  66.4405 0003733 228.4493 131.6400 16.35853919 71009

This is 0.8 seconds early against the "9547" SatEvo evolution I posted 
yesterday. I now predict decay for February 27.73 +-0.15d.

Prediction:
Cosmos 1043      5.0  1.5  0.0  5.4 v            176 x 172 km
1 11055U 78094A   98057.88074715  .04869161  16530-1  55956-3 0 95482
2 11055  81.1320  66.2698 0003491 227.9614 132.0088 16.36942911 71028
Cosmos 1043      5.0  1.5  0.0  5.4 v            171 x 167 km
1 11055U 78094A   98058.06403377  .06001026  25769-1  55368-3 0 95484
2 11055  81.1313  66.0133 0003094 227.2286 132.7453 16.38919668 71050
Cosmos 1043      5.0  1.5  0.0  5.4 v            164 x 160 km
1 11055U 78094A   98058.24707275  .07763546  40095-1  53355-3 0 95484
2 11055  81.1305  65.7564 0002638 226.4945 133.4836 16.41417960 71089
Cosmos 1043      5.0  1.5  0.0  5.4 v            155 x 152 km
1 11055U 78094A   98058.42979071  .11122240  95116-1  37180-3 0 95486
2 11055  81.1292  65.4989 0002086 225.7586 134.2243 16.44784453 71114
Cosmos 1043      5.0  1.5  0.0  5.4 v            139 x 138 km
1 11055U 78094A   98058.61203832  .22365104  47565+0  26506-3 0 95485
2 11055  81.1274  65.2404 0001322 225.0202 134.9690 16.50348075 71143
Cosmos 1043      5.0  1.5  0.0  5.4 v            130 x 129 km
1 11055U 78094A   98058.67261577  .37835097  15988+1  26277-3 0 95480
2 11055  81.1263  65.1539 0000939 224.7732 135.2192 16.53804574 71152

              ---------------------------------

The latest elset for the CZ-2C platform is:
Irid 42 CZ plat 10.0  3.0  0.0  3.0 d            202 x 154 km
1 25080U 97077D   98057.68742393  .05197157 -16039-5  42020-3 0  1764
2 25080  86.1792  77.8531 0036232 206.5740 153.3741 16.35491952 12665
This is all of 48 seconds late against yesterday's "9168" evolution.
It may decay at about February 27.33 +-0.1d.
Prediction:
Irid 42 CZ plat 10.0  3.0  0.0  3.0 d            189 x 149 km
1 25080U 97077D   98057.87078897  .09154806  58040-1  46551-3 0 91769
2 25080  86.1782  77.7423 0030471 205.7613 154.0866 16.38675297 12690
Irid 42 CZ plat 10.0  3.0  0.0  3.0 d            174 x 143 km
1 25080U 97077D   98058.05379512  .13933188  13531+0  39965-3 0 91766
2 25080  86.1768  77.6312 0023345 204.9463 154.9407 16.42779976 12724
Irid 42 CZ plat 10.0  3.0  0.0  3.0 d            147 x 130 km
1 25080U 97077D   98058.23620009  .35134357  10614+1  35822-3 0 91769
2 25080  86.1744  77.5195 0012758 204.1276 155.8126 16.50406805 12754
Irid 42 CZ plat 10.0  3.0  0.0  3.0 d            124 x 116 km
1 25080U 97077D   98058.29673867 1.11935504  11483+2  47212-3 0 91765
2 25080  86.1728  77.4820 0005985 203.8531 156.1191 16.57409887 12761

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/