Decay watch: Dec 5

Alan Pickup (alan@wingar.demon.co.uk)
Sun, 5 Dec 1999 19:31:43 +0000

#22924 = 93- 74 C = USA 97 Centaur r
  The first SpaceCom decay notice for this formerly classified object
was posted just after I left on a two-day trip on Friday. By the time I
returned today, it was already down. I calculate that the decay occurred
at Dec 5 06:38 UTC +-15m over central Africa near 5.1 N, 17.5 E, a
little beyond the northbound equator crossing given by this final
SatEvo-predicted elset:
USA 97 Centaur r                                 180 x 108 km
1 22924U 93074C   99339.27438554 2.03295249  14494+2  11402-2 0 90127
2 22924  25.6596 179.8728 0055002 347.9227  11.9461 16.48202531  7632
SpaceCom puts the decay a little further back at Dec 5 06:34 +-7m near
1.4 S, 3.6 E.

#25923 = 99- 52 B = Telstar 7 Ariane 44LP r
The perigee of this object is being forced down very quickly
by luni-solar gravitational effects. Nevertheless, the latest elset...
Telstar 7 Ariane 44LP r                          17874 x -919 km
1 25923U 99052B   99339.26140771  .00002668 -16720-4  10000-3 0   771
2 25923   6.4226 260.0346 6325645 213.1719 111.2002  4.79544766   930
...is probably premature in implying that this already has a 
subterranean perigee. I am not going to hazard a SatEvo prediction, 
at least for the present. SpaceCom says Dec 8 11:31 +-2d.

For more details, see
      http://www.wingar.demon.co.uk/satevo/dkwatch/


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/

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