Re: Unknown distant satellite on polar orbit

From: Mike McCants (mmccants@io.com)
Date: Sun Jul 15 2007 - 13:01:49 EDT

  • Next message: Mike McCants: "Re: Unknown distant satellite on polar orbit"

    Dmitry Chestnov posted:
    
    >Unknown distant satellite on polar orbit
    
    The range would seem to be about 20000 Km and the brightness
    of even a large object would be magnitude 9 or so.  A brightening
    from 8.5 to 7 and back to 9.5 would seem to be a flare.
    
    I can fit these orbits to the observations:
    
    A 12 hour eccentric orbit with an unusual argument of perigee:
    
    1 99991U          07193.07740740 0.00000000  00000-0  00000-0 0    09
    2 99991  64.0000 305.7300 7000000 222.8000 137.2000  2.00600000    09
    
    A 24 hour slightly eccentric orbit with the perigee at the point
    of observation.
    
    1 99991U          07192.97552546 0.00000000  00000-0  00000-0 0    02
    2 99991  69.1000 305.9100 2880000 350.0000  10.0000  1.00270000    00
    
    An 8 hour orbit with the object near apogee:
    
    1 99991U          07193.02542823 0.00000000  00000-0  00000-0 0    06
    2 99991  64.0000 305.4300 6800000 211.8000 148.2000  3.00000000    08
    
    A circular orbit:
    
    1 99991U          07192.96118055 0.00000000  00000-0  00000-0 0    04
    2 99991  68.5000 305.6700 0001000 222.8000 137.2000  1.88000000    04
    
    A 4 day eccentric orbit:
    
    1 99991U          07193.42423263 0.00000000  00000-0  00000-0 0    06
    2 99991  68.5000 306.3200 7205000 312.8000  47.2000  0.25000000    00
    
    I don't think any of these orbits is likely.
    
    Mike McCants
    
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