USA 161 search elements

From: Ted Molczan (seesat@rogers.com)
Date: Mon Mar 06 2006 - 02:44:56 EST

  • Next message: Richard Clark: "Re: Geosat Solar Transit?"

    On 2006 Mar 04 UTC, Russell Eberst observed USA 161 (01044A / 26934) running
    considerably early:
    
    http://satobs.org/seesat/Mar-2006/0054.html
    
    relative its last known orbit:
    
    USA 161         15.0  4.0  0.0  5.2 v                    403 X 966 km
    1 26934U 01044A   06010.86341370  .00001200  00000-0  68132-4 0    02
    2 26934  97.9180 120.2251 0343693  94.7482 265.2517 14.74446208    03
    
    Compensating for Earth's rotation in the interim between prediction and
    observation, revealed a large change in the predicted path, suggesting that the
    eccentricity had been changed considerably.
    
    The ideal time for such major orbital surgery occurred on or about Feb 09 UTC,
    when the object's perigee was near the equator. I concocted the following search
    orbits for that date:
    
                                                             316 X 988 km
    1 70000U          06040.65467307  .00005201  00000-0  12000-3 0    02
    2 70000  97.9180 149.4085 0478000 358.8090   1.2264 14.72020000    07
                                                             286 X 990 km
    1 70000U          06040.65467306  .00008048  00000-0  12000-3 0    03
    2 70000  97.9180 149.4085 0502000 358.8090   1.2264 14.76258500    07
    
    Both fairly accurately predict Russell's observation, so they should be
    reasonably useful for searching. I suggest allowing at least 5 min for
    prediction time uncertainty.
    
    Ted Molczan
    
    
    -------------------------------------------------------------------------
    Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive:  
    http://www.satobs.org/seesat/seesatindex.html
    



    This archive was generated by hypermail 2b29 : Mon Mar 06 2006 - 02:48:47 EST