IGS-OVS recovered

From: Ted Molczan (ssl3molcz@rogers.com)
Date: Wed Apr 17 2013 - 14:12:08 UTC

  • Next message: Kevin Fetter: "flashing glonass sat"

    Last night, Scott Tilley reported an UNID that he called 99138. I responded that the orbit was close to that of USA 161
    (01044A / 26934). Scott pointed out off-list that it was also close to IGS-OVS (07005B / 30587). This morning, Russell
    Eberst reported the same object as 99138, which he labelled 01044A. The object correlates much more closely with 07005B;
    here are approximate elements:
    
    IGS-OVS                                                  402 X 404 km
    1 30587U 07005B   13107.06454976  .00044004  00000-0  69000-3 0    01
    2 30587  97.4265 248.3420 0001000 228.0046 132.1122 15.53698369    01
    Arc 20130416.43-0417.08 WRMS resid 0.015 totl 0.010 xtrk
    
    I used Mike McCants' int2 to propagate the last known orbit (TLE of epoch 12236.02944086) to the present, adjusting its
    rate of decay to match the present mean motion. I used the propagated inclination, argument of perigee and rate of decay
    plus my guess of the eccentricity, as fixed values in the differential correction that fit the above TLE to the
    observations.
    
    Satevo propagates the orbit to decay in early November 2013; uncertainty is at least one month.
    
    Ted Molczan
    
    
    _______________________________________________
    Seesat-l mailing list
    http://mailman.satobs.org/mailman/listinfo/seesat-l
    



    This archive was generated by hypermail 2b29 : Wed Apr 17 2013 - 14:12:43 UTC