Decay watch: May 31
Alan Pickup (alan@wingar.demon.co.uk)
Mon, 31 May 1999 19:56:54 +0100
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Object: #25745 = 99- 28 B = USA 144 Titan 4 r
Decay predictions:
Source Prediction made Predicted decay at Latitude Longitude
UTC UTC deg deg
SpaceCom May 24 21:58 Jun 2 11:36 +-5d 63.4 S 94.0 W
SpaceCom May 26 06:28 Jun 1 14:00 +-4d 47.1 N 3.3 W
SpaceCom May 28 11:26 Jun 1 11:29 +-2d 19.2 N 172.6 E
SpaceCom May 29 13:30 Jun 1 13:04 +-2d 6.9 S 161.8 E
SpaceCom May 30 16:04 Jun 1 11:07 +-1d 54.4 N 52.3 E
SpaceCom May 31 13:15 Jun 1 13:44 +-18h 12.1 S 37.8 W
SatEvo May 25 12:00 Jun 3 +-3d
SatEvo May 27 19:00 Jun 1 23:00 +-1.4d
SatEvo May 28 21:25 Jun 1 02:43 +-20h
SatEvo May 29 16:20 Jun 1 06:25 +-18h
SatEvo May 30 13:40 Jun 1 07:49 +-12h
SatEvo May 31 17:30 Jun 1 07:48 +-9h 16.5 S 49.3 E
Latest elset by Rainer Kracht:
USA 144 Titan 4 r 226 x 178 km
1 25745U 99028 B 99150.37082156 .02600828 00000-0 65758-3 0 00
2 25745 63.3428 72.0095 0036428 179.2003 180.7988 16.26397285 09
SatEvo prediction:
USA 144 Titan 4 r 183 x 155 km
1 25745U 99028 B 99151.84186513 .08028400 47388-1 56027-3 0 90000
2 25745 63.3387 66.0725 0021376 179.2437 180.7594 16.38808338 241
USA 144 Titan 4 r 171 x 148 km
1 25745U 99028 B 99152.02473849 .12117149 11965+0 43486-3 0 90001
2 25745 63.3376 65.3249 0017645 179.2493 180.7531 16.42375657 270
USA 144 Titan 4 r 150 x 135 km
1 25745U 99028 B 99152.20708936 .27314581 58637+0 34391-3 0 90006
2 25745 63.3357 64.5743 0011505 179.2551 180.7465 16.48835109 302
USA 144 Titan 4 r 137 x 126 km
1 25745U 99028 B 99152.26766773 .46732609 22714+1 32370-3 0 90004
2 25745 63.3345 64.3230 0008134 179.2570 180.7441 16.53004224 310
Note: I predict decay on the northbound approach to an equator crossing
at 07:52 UTC at 56.6 deg E. SpaceCom keeps it in orbit a few hours more.
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Object: #25683 = 99- 20 B = Landsat 7 Delta r
Decay predictions:
Source Prediction made Predicted decay at Latitude Longitude
UTC UTC deg deg
SpaceCom May 26 20:46 May 30 20:26 +-2d 25.7 S 102.5 W
SpaceCom May 28 19:51 May 30 17:37 +-1d 52.4 S 75.7 W
SpaceCom May 29 23:11 May 30 23:29 +-15h 48.6 S 160.1 W
SpaceCom May 30 09:43 May 30 21:45 +-7h 12.7 N 109.3 W
SpaceCom May 30 16:01 May 30 22:05 +-4h 61.8 S 154.2 W
SpaceCom May 30 19:29 May 30 21:37 +-2h 40.0 N 95.1 W
SpaceCom May 30 21:58 May 30 21:13 +-38m 33.9 N 62.3 E
SatEvo May 25 19:30 Jun 1 00:00 +-1.2d
SatEvo May 26 18:00 May 31 10:00 +-1d
SatEvo May 27 18:00 May 31 09:00 +-0.8d
SatEvo May 28 21:40 May 31 03:50 +-12h
SatEvo May 29 16:40 May 31 03:04 +-9h
SatEvo May 30 13:10 May 31 01:20 +-4h 12.4 S 16.1 E
SatEvo May 30 21:31 May 30 21:28 +-2h 63.5 N 71.1 W
SatEvo May 31 18:45 May 30 21:28 +-1h 63.5 N 71.1 W
Final elset:
Lndst7 Delta r 5.9 2.4 0.0 5.0 d 168 x 109 km
1 25683U 99020B 99150.81526140 .24972555 97863-5 14791-3 0 1438
2 25683 107.5652 279.5692 0045449 251.9013 107.9641 16.50265857 7076
Note: The final elset shows it 24 seconds early against yesterday's
prediction. The SpaceCom prediction was much more accurate than my
SatEvo one.
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Object: #20055 = 89- 43 D = Molniya 3-35 r2
Decay predictions:
Source Prediction made Predicted decay at Latitude Longitude
UTC UTC deg deg
SpaceCom May 30 09:12 Jun 5 07:36 +-4d 14.4 S 136.3 E
SpaceCom May 31 00:19 Jun 3 17:01 +-2d 21.3 S 161.6 E
SatEvo May 30 13:30 Jun 3 15:00 +-2d
SatEvo May 31 18:55 Jun 4 01:00 +-2d
Latest elset:
Molniya 3-35 r2 5021 x 88 km
1 20055U 89043D 99151.46518045 .39666163 30007-5 10642-2 0 8847
2 20055 63.5170 326.5680 2761354 246.4329 137.7531 10.28365652 56493
SatEvo prediction:
Molniya 3-35 r2 4518 x 84 km
1 20055U 89043D 99152.02243902 .43703311 31780-1 87181-3 0 98846
2 20055 63.5131 325.6409 2554321 246.4271 84.8158 10.73797663 56554
Molniya 3-35 r2 3546 x 84 km
1 20055U 89043D 99153.00564557 .56105172 56275-1 93920-3 0 98846
2 20055 63.5050 323.8027 2112545 246.4165 90.0597 11.70769025 56667
Note: The latest elset has it 86 seconds late on yesterday's prediction.
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Alan
--
Alan Pickup | COSPAR 2707: 55d53m48.7s N 3d11m51.2s W 156m asl
Edinburgh | Tel: +44 (0)131 477 9144 Fax: +44 (0)870 0520750
Scotland | SatEvo page: http://www.wingar.demon.co.uk/satevo/