Decay watch: 2000 Dec 22

From: Alan Pickup (alan@wingar.demon.co.uk)
Date: Fri Dec 22 2000 - 07:00:40 PST

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    To tidy up the #18719 decay, which I left "on the brink" a couple of
    days ago...
    _____________________________________________________________________
    Object: #18719 = 87-109 E = Ekran 17 aux motor
    
    Final decay analyses:
    Source   Prediction made    Predicted decay at      Latitude Longitude
                   UTC                UTC                  deg      deg
    SpaceCom   Dec 20 18:56     Dec 20 18:10 +-32m       37.5 S   130.0 E
    SatEvo     Dec 20 19:25     Dec 20 21:21 +-30m       28.8 S   176.6 W
    
    Final elset:
    Ekran 17 aux motor                               293 x 116 km
    1 18719U 87109E   00355.71393361  .42339046  11803-4  59968-3 0  9300
    2 18719  46.9197 265.1988 0134218 289.8119  69.6995 16.25528500175269
    
    Note: The final elset took some time to appear and shows the object
    running 14 sec late against my previous prediction. I estimate 
    that this decayed northbound to the NE of New Zealand on the second 
    of the following two SatEvo-predicted revs:
    Ekran 17 aux motor                               239 x 114 km
    1 18719U 87109E   00355.77500858  .66935817  15408+1  70744-3 0 99272
    2 18719  46.9088 264.8347 0095127 291.0452  67.9399 16.35914637175274
    Ekran 17 aux motor                               187 x 109 km
    1 18719U 87109E   00355.83595837 1.26174001  95186+1  80102-3 0 99277
    2 18719  46.9060 264.4550 0059433 291.4159  67.9510 16.46688693175282
    This is two revs later than SpaceCom's estimate.
    _____________________________________________________________________
    
    
    Alan
    -- 
    Alan Pickup / COSPAR 2707:  55d53m48.7s N   3d11m51.2s W      156m asl
    Edinburgh  / SatEvo & elsets:    http://www.wingar.demon.co.uk/satevo/
    Scotland  / Decay Watch: http://www.wingar.demon.co.uk/satevo/dkwatch/
             *
    
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