Updated elements

From: Ted Molczan (ssl3molcz@rogers.com)
Date: Wed May 25 2011 - 17:00:06 UTC

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    Russell Eberst, Marco Langbroek, and Peter Wakelin contributed observations used to produce the following TLEs.
    
    Mentor 2                                             35774 X 35803 km
    1 25336U 98029A   11144.42486063  .00000000  00000-0  00000-0 0    04
    2 25336   8.4419   8.8609 0003459 239.5860 120.3828  1.00269392    08
    Arc 20110522.91-0524.98 WRMS resid 0.004 totl 0.002 xtrk
    
    Mentor 2, a large SIGINT satellite, recently relocated from 14.8 W to 25.8 W, close to the longitude occupied by another
    large SIGINT satellite: Mercury 1 (94054A / 23223).
    
    NanoSail-D                                               559 X 605 km
    1 37361U 10062L   11144.95086546  .00046763  00000-0  42946-2 0    09
    2 37361  71.9563  86.9774 0032811 216.2338 143.6611 14.94352010    05
    Arc 20110521.02-0524.97 WRMS resid 0.028 totl 0.019 xtrk
    
    The eccentricity and argument of perigee of 10062L remain a bit uncertain. Russell's reports that it flashes with a
    period between 1 s and 2 s have been confirmed by Bram Dorreman and Marco Langbroek.
    
    Bram observed it on consecutive nights, and accurately timed the flash period at 1.69 S and 1.73 s:
    
    yy-nnncc yy-mm-dd hh:mm:ss.s ooo sss.s s.s nnn ff.fff comments
    10- 62 L 11-05-23 00:49:04.6 BD   65.9 0.1  39  1.69  A; +1.0->inv
    10- 62 L 11-05-24 23:24:21.1 BD   74.5 0.1  43  1.73  F'F => F'_; +1.3->inv
    
    PPAS format: http://www.satobs.org/tumble/flashpm.html#PPASformat
    
    Bram, Marco, Ralf Vandebergh and Russell observed it on the same pass last night (May 24) between 23:21 and 23:24 UTC.
    Marco reported that it initially flashed 1 to 3 times per second, but later in the pass it had a period of about 1.6 s: 
    
    http://satobs.org/seesat/May-2011/0289.html
    
    That is close to the 1.73 s that Bram reported. Russell's 1 s period (stated to the nearest second) is consistent. Ralf
    reported it steady, which is surprising, given his close proximity to the other observers - within ~61 km of Bram. Ralf
    reported it flashing rapidly on May 21 UTC.
    
    Ted Molczan 
    
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