Re: Ah give me a break = another possible unid sat !!!

From: C. Bassa (cgbsat@gmail.com)
Date: Sun Jul 07 2013 - 14:30:34 UTC

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    Hi Kevin,
    
    Here are some observations that I obtained from your video:
    99208 13 687A   1775 G 20130706063133577 17 25 2236556-120078 37 S
    99208 13 687A   1775 G 20130706063141853 17 25 2237852-120099 37 S
    99208 13 687A   1775 G 20130706063151596 17 25 2239420-120134 37 S
    99208 13 687A   1775 G 20130706063211816 17 25 2242677-120179 37 S
    99208 13 687A   1775 G 20130706063221792 17 25 2244289-120210 37 S
    99208 13 687A   1775 G 20130706063231753 17 25 2245929-120243 37 S
    99208 13 687A   1775 G 20130706063239943 17 25 2247313-120275 37 S
    
    Because the arc is so short a lot of orbits will fit these
    observations. If we were to assume it is an object in a geostationary
    transfer orbit (fixing the eccentricity and mean motion at 0.7 and
    2.25 revs/day, respectively), I can get the following solutions; the
    first is moving towards perigee, the second towards apogee.
    
    1 99208U          13187.27230046  .00000000  00000-0  00000-0 0    02
    2 99208  19.5693 290.8157 7000000 130.2269 343.0717  2.25000000    06
    1 99208U          13187.27230046  .00000000  00000-0  00000-0 0    02
    2 99208  27.3283 181.9202 7000000  63.6638  13.1143  2.25000000    06
    
    These orbits are not really useful for recovering the object as in
    practice GTO orbits have a range of eccentricities and mean motions.
    
    Regards,
        Cees
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