Decay watch: May 29
Alan Pickup (alan@wingar.demon.co.uk)
Sat, 29 May 1999 17:53:33 +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
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
Latest elset by Pierre Neirinck:
USA 144 Titan 4 r 250 x 188 km
1 25745U 99028 B 99148.89216350 .01710000 00000-0 68365-3 0 09
2 25745 63.3750 77.9827 0046500 177.0536 182.1664 16.20177744 00
Latest elset by Rainer Kracht:
USA 144 Titan 4 r 249 x 182 km
1 25745U 99028 B 99149.20064118 .01833000 00000-0 61814-3 0 06
2 25745 63.4618 76.4579 0051352 167.4587 192.7322 16.21488715 04
SatEvo prediction from Pierre's elset:
USA 144 Titan 4 r 233 x 181 km
1 25745U 99028 B 99150.00185275 .02348847 27321-2 67863-3 0 90001
2 25745 63.3736 73.5679 0039800 177.0745 182.9489 16.24598956 186
USA 144 Titan 4 r 223 x 176 km
1 25745U 99028 B 99150.55535805 .02929912 43891-2 67210-3 0 90003
2 25745 63.3726 71.3540 0035648 177.0851 182.9357 16.27496209 277
USA 144 Titan 4 r 211 x 170 km
1 25745U 99028 B 99151.04643764 .03789458 77399-2 65643-3 0 90000
2 25745 63.3715 69.3811 0031357 177.0948 182.9234 16.30757387 357
Note: Pierre's latest elset shows this running 15 seconds late (at the
equator crossing) against the SatEvo prediction I posted yesterday.
However, Rainer's elset has it only 1 second late at the equator
crossing. Comparison is complicated by the fact that the eccentricities
differ markedly and that this is being observed while well north of the
equator.
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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
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
Latest elset:
Lndst7 Delta r 5.9 2.4 0.0 5.0 d 274 x 139 km
1 25683U 99020B 99149.52905094 .03974273 93384-5 18758-3 0 1362
2 25683 107.5609 276.0922 0102083 241.0998 117.9915 16.24818205 6869
SatEvo prediction:
Lndst7 Delta r 5.9 2.4 0.0 5.0 d 249 x 136 km
1 25683U 99020B 99150.02083180 .05893453 11760-1 20333-3 0 91369
2 25683 107.5591 277.4191 0085696 239.9016 119.2461 16.30108963 6949
Lndst7 Delta r 5.9 2.4 0.0 5.0 d 217 x 130 km
1 25683U 99020B 99150.51085662 .08941104 35588-1 18970-3 0 91368
2 25683 107.5567 278.7523 0065897 238.6973 120.6558 16.37113115 7029
Lndst7 Delta r 5.9 2.4 0.0 5.0 d 141 x 109 km
1 25683U 99020B 99151.05858622 .41129406 12594+1 18207-3 0 91366
2 25683 107.5509 280.2649 0024485 237.3303 122.4331 16.55414959 7112
Lndst7 Delta r 5.9 2.4 0.0 5.0 d 109 x 96 km
1 25683U 99020B 99151.11891855 1.66250943 22708+2 30183-3 0 91363
2 25683 107.5492 280.4350 0010489 237.1765 122.7224 16.64187069 7127
Note: The latest elset shows this to be 7 seconds early against the
prediction I posted yesterday.
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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/