Decay watch: 2001 Feb 19

From: Alan Pickup (alan@wingar.demon.co.uk)
Date: Mon Feb 19 2001 - 12:45:29 PST

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    From today's update to my Decay Watch page...
    _____________________________________________________________________
    Object: #16112 = 85- 91 A = Molniya 3-26
    
    Decay predictions:
    Source   Prediction made    Predicted decay at      Latitude Longitude
                   UTC                UTC                  deg      deg
    SpaceCom   Feb 19 01:52     Feb 21 22:05 +-2d        59.4 S   125.4 W
    SatEvo     Feb 19 19:20     Feb 21 23:44 +-1.2
    
    Latest elset:
    Molniya 3-26                                     4617 x 75 km
    1 16112U 85091A   01050.51765911  .82325621  00000-0  10207-2 0   122
    2 16112  62.5409  63.2694 2602452 263.6865  66.5094 10.65466530113232
    
    SatEvo prediction: See Decay Watch page.
    
    Note: The latest elset shows this running 76 seconds late against
    yesterday's prediction. The prediction remains uncertain.
    _____________________________________________________________________
    Object: #16125 = 85- 91 D = Molniya 3-26 r2
    
    Decay predictions:
    Source   Prediction made    Predicted decay at      Latitude Longitude
                   UTC                UTC                  deg      deg
    SpaceCom   Feb 19 10:45     Feb 19 23:03 +-8h        31.9 S    80.6 E
    SatEvo     Feb 19 19:30     Feb 20 00:28 +-3h        37.8 S    53.4 E
    
    Latest elset:
    Molniya 3-26 r2                                  516 x 74 km
    1 16125U 85091D   01050.71726321  .99999999  00000-0  38655-3 0  9580
    2 16125  61.9093 235.9988 0331068 290.8855  65.8384 15.92643015122237
    
    SatEvo prediction: See Decay Watch page
    ..(ends)
    Molniya 3-26 r2                                  352 x 80 km
    1 16125U 85091D   01050.90442046 1.11137914  15995+1  36492-3 0 99581
    2 16125  61.8998 235.2352 0206295 290.9738  66.8314 16.21442324122262
    Molniya 3-26 r2                                  265 x 78 km
    1 16125U 85091D   01050.96591513 1.63789663  46440+1  41022-3 0 99586
    2 16125  61.8952 234.9753 0142582 291.0040  67.4766 16.37747545122278
    
    Note: The latest elset shows this running 90 sec early early against 
    yesterday's prediction. I estimate that this will decay near perigee
    on the last of these SatEvo-predicted revs, northbound over the SW 
    Indian Ocean.
    _____________________________________________________________________
    Object: #20094 = 89- 48 F = Raduga 1-1 aux motor
    
    Decay predictions:
    Source   Prediction made    Predicted decay at      Latitude Longitude
                   UTC                UTC                  deg      deg
    SpaceCom   Feb 11 11:28     Feb 20 11:55 +-16h       40.7 N    41.4 W
    SatEvo     Feb 19 19:40     Feb 20 13:16 +-6h        46.6 N    96.3 W
    
    Latest elset:
    Raduga 1-1 aux motor                             613 x 119 km
    1 20094U 89048F   01050.72393993  .18372635  00000-0  51235-3 0  2239
    2 20094  46.4451 165.9965 0366187  63.1578 300.6879 15.67644472166522
    
    SatEvo prediction: See Decay Watch page
    ..(ends)
    Raduga 1-1 aux motor                             300 x 107 km
    1 20094U 89048F   01051.47639419  .76464512  12682+1  72472-3 0 92164
    2 20094  46.4254 161.5929 0146442  67.1548 294.3850 16.26045316166533
    Raduga 1-1 aux motor                             242 x 104 km
    1 20094U 89048F   01051.53755664 1.15936224  40131+1  80640-3 0 92166
    2 20094  46.4225 161.2135 0104979  67.5335 293.5749 16.37349882166540
    
    Note: The latest elset shows it running 64 sec late against yesterday's 
    prediction. I show this decaying just beyond northern apex while 
    eastbound over the USA from southern Oregon at 13:11 UTC to Minneapolis
    at 13:15 and Boston at 13:21.
    _____________________________________________________________________
    Object: #26600 = 00- 69 B = Beidou-1 Long March 3 rocket
    
    Decay predictions:
    Source   Prediction made    Predicted decay at      Latitude Longitude
                   UTC                UTC                  deg      deg
    SpaceCom   Feb 19 06:15     Feb 19 18:41 +-12h       13.5 S    75.5 E
    SatEvo     Feb 19 19:50     Feb 19 13:53 +-15m        0.0     179.3 E
    
    Latest (final?) elsets:
    Beidou-1 LM3 r                                   839 x 98 km
    1 26600U 00069B   01050.46202262  .07690429 -10650-4  10000-3 0  1630
    2 26600  24.8429 178.0560 0540594 334.8046  81.9384 15.32521292  3724
    Beidou-1 LM3 r                                   399 x 95 km
    1 26600U 00069B   01050.53104425  .14071856 -12227-4  10000-3 0  1659
    2 26600  24.8185 177.5064 0228870 331.3369 112.2842 16.10013933  3739
    
    Note: The two latest elsets have drag terms that are much too
    low but, unless they are otherwise fictitious, it is clear that
    this decayed unexpectedly quickly at the end. Decay probably came 
    near the end of the second of these revs, while the rocket was near 
    a northbound equator crossing close to the International Date Line
    over the Pacific. The final decay warnings from SpaceCom have 
    yet to appear.
    _____________________________________________________________________
    
    
    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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    This archive was generated by hypermail 2b29 : Mon Feb 19 2001 - 12:46:49 PST