Re: USA 161 search elements

From: Russell Eberst (eberst@blueyonder.co.uk)
Date: Fri May 10 2013 - 13:41:38 UTC

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    On 10/05/2013 12:44, Ted Molczan wrote:
    > Thank you Cees Bassa, for reminding me of Scott Tilley's UNID 99142 of 2013 Apr 25 UTC, which he suspected is USA 161,
    > and which I can confirm matches Russell's 9900001 of May 09 UTC.
    >
    > Assuming no manoeuvres in the interim, and a few other guesses, here is a rough orbit:
    >
    > USA 161                                                  374 X 401 km
    > 1 70000U          13129.07129498  .00023386  00000-0  30000-3 0    04
    > 2 70000  97.0926 261.3512 0020000  69.0000 291.3394 15.58885351    09
    >    
    I have found another observation of mine that may well be of USA 161.
    
    On the morning of April 30, I reported an observation of 07-05A at 
    00:41:40.31 at
      R.A. = 203302, Dec = +142954 (1950.0)
    
    Mike McCants found that this was running around 40 seconds ahead of 
    observations made by Cees
    on the same transit of 07-05A. We agreed to put the observation in 
    abeyance, for further study sometime
    later.
    
    I now believe that I actually saw USA 161 (01-44A).
    This is also confirmed by its appearance - it was seen as 'steady' 
    whereas 07-05A shows vigorous and
    fairly rapid fluctuations in magnitude.
    So the combined efforts of Scott, Cees, Mike, Ted and myself look like 
    we are pinning down the orbit
    of USA 161.
    
    Regards
    Russell
    
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