Decay watch: May 25

Alan Pickup (alan@wingar.demon.co.uk)
Tue, 25 May 1999 20:47:05 +0100

SpaceCom has issued its first decay notice for the new Titan 4 rocket, 
identifying its payload as "USA 144" for the first time.
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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

SatEvo     May 25 12:00     Jun  3       +-3d

Latest elset (new ones are overdue):
USA 144 Titan 4 r                                293 x 200 km
1 25745U 99028B   99144.99058024  .00785832  79431-5  55546-3 0    42
2 25745  63.3898  93.1775 0070162 170.4206 189.8324 16.10130841   112

Note: This is well placed at northern latitudes near the middle of the
night. It is also bright; I estimated it at magnitude zero last night
while Russell Eberst reports it as magnitude -0.4 on the same pass.
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Object: #25683 = 99- 19 E = Landsat 7 Delta r

Decay predictions:
Source   Prediction made    Predicted decay at      Latitude Longitude
               UTC                UTC                  deg      deg

SpaceCom   (no prediction yet)

SatEvo     May 25 19:30     June  1 00:00 +-1.2d

Latest elset:
Lndst7 Delta r   5.9  2.4  0.0  5.0 d            378 x 157 km
1 25683U 99020B   99145.55729062  .01924183  89463-5  48658-3 0  1166
2 25683 107.5672 265.6122 0166080 245.5998 112.7924 16.02442326  6227

Note: Another well placed object for European observers. It leaves 
eclipse in the Earth's shadow near 50 deg N latitude around local 
midnight while northbound. Eclipse entry occurs while southbound 
near 72 deg S at around 08h local time.
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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/