Observations, 17 July, Early UT

From: Jonathan T Wojack (tlj18@juno.com)
Date: Tue Jul 16 2002 - 23:13:10 EDT

  • Next message: Mark Hanning-Lee: "Recent observations"

    After the third try, I was finally able to see Feng Yun 1D Rk (27432). 
    It was flashing from invisible to about +5 when I acquired it in Bootes. 
    As it moved to Ursa Major, it was supposed to dim, but instead the
    flashes increased in brightness to +4 to +3.  This probably occured
    because the satellite's azimuth was approaching that of the azimuth of
    where the Sun set.  I recorded approximately 90 flashes (I was hoping for
    100).  Approximately once every 10 flashes or so, one flash seemed to not
    appear.  Near the end of the pass, as the flashes began to dim once again
    as 27432 went towards the north sky, a lot of flashes seemed to not
    appear.  So I stopped where I thought I saw my last flash (~ 90) and I
    stopped my stopwatch.
    
    For about 90 flashes, I accumulated 160.17 seconds.  I rounded that to
    160 seconds.  That comes out to a period of 1.778 seconds, +/- 0.1
    seconds.  Considering that the satellite had a reported (by either Mike
    McCants or Ed Cannon) flash period of 1.6 seconds on 10 July, which is
    pretty accurate, considering that I haven't timed a flashing satellite
    for at least a year, probably more.  It certainly is a lot of fun timing
    flashers! 
    
    More than an hour later, I tried to see the NOSS 2-1 trio.  They did not
    show up, but it was hazy and they were predicted at +7.4 anyway.  While
    looking for them in vain, I serendipitously sighted the Resurs 1-4 Rk
    (25400), which was predicted to be at +3.6.  There was no perceptible
    flashing action or tumbling for the 10-15 seconds that I followed it,
    which was not surprising, considering that it was launched 4 years ago.
    
    ---------------------------------------------------------
    Jonathan T. Wojack             tlj18@juno.com
    39.706d N   75.683d W   4 hours behind UT (-4)
    
    
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