RE: IGS 7A objects

From: Ted Molczan (ssl3molcz@rogers.com)
Date: Fri Mar 23 2012 - 13:25:17 UTC

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    Observations last night by Russell Eberst and Björn Gimle result in the following elements. 
    
    IGA 7A r                                                 467 X 504 km
    1 37955U 11075B   12082.87449044  .00005213  00000-0  20302-3 0    00
    2 37955  97.4140 155.2388 0027270  49.6731 310.6883 15.25663126    02
    Arc 20120318.89-0322.89 WRMS resid 0.050 totl 0.029 xtrk
    
    Björn reported 11075A a no-show on Mar 22, on the pass that culminated near 18:43 UTC, at 18 deg elevation in the east.
    He observed within -6/+5 min of the prediction based on the 70002 search TLE:
    
    1 70002U          12080.86644012  .00000000  00000-0  00000-0 0    04
    2 70002  97.4140 152.7489 0002000 207.7372 152.3760 15.26000000    00
    
    That TLE is based on the assumption that the orbital altitude is the same as those of previous IGS radar satellites. In
    case the object was unusually faint, it probably would be worth continued effort to observe it in the 70002 orbit. I am
    able to fit somewhat higher orbits to the short arc of Russell's discovery observations, which may be worth trying if
    the search needs to be extended:
    
    1 70003U          12080.86636298  .00000000  00000-0  00000-0 0    02
    2 70003  97.4140 153.0900 0002000 279.5319  80.5874 15.21000000    04
    
    1 70004U          12080.86634883  .00000000  00000-0  00000-0 0    01
    2 70004  97.4140 153.0996 0002000 337.4887  22.6795 15.19000000    00
    
    1 70005U          12080.86628825  .00000000  00000-0  00000-0 0    01
    2 70005  97.5000 153.5312 0002000 201.5255 158.5895 15.17000000    02
    
    Ted Molczan
    
    
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