TJM obs of 2010 Aug 29 UTC

From: Ted Molczan (ssl3molcz@rogers.com)
Date: Sun Aug 29 2010 - 09:56:17 UTC

  • Next message: Kevin Fetter: "AEHF 1 Obs"

    On Aug 29 at 05:25:38 UTC, Kevin Fetter recorded a few second flash by AEHF 1 (10039A / 36868) to
    about mag 7.2, at a range of 24100 km. 
    
    http://satobs.org/seesat/Aug-2010/0372.html
    
    (Kevin was uncertain whether it was the payload or the rocket; however, the two are far apart, and
    the observed position matches the payload.)
    
    I observed it more than an hour later, for about 5 min, at about 10,000 km range. I did not see any
    bright flashes, but noted what seemed to be an irregular variation. Some payloads rotate while in
    GTO (geostationary transfer orbit), so it would be interesting to determine whether AEHF's variation
    may in fact be regular, and the period.
    
    AEHF 1's Centaur (10039B / 36869) exhibited a regular variation with a period I guess was at least 2
    min. It faded to invisibility for a time around 08:22 UTC (limiting mag ~9.5), then began to
    brighten.
    
    Helios 1B (09073A / 36124) was 4.4 s early, and within 0.02 deg cross-track, relative my 2.2 d old
    preliminary elset, derived from Russell Eberst's discovery point.
    
    36868 10 039A   2701 G 20100829062937370 17 25 0236061+065272 56 I+090 05
    36868 10 039A   2701 G 20100829063348000 17 25 0306365+052168 97 I+085 05
    36868 10 039A   2701 G 20100829063412530 17 25 0309613+051258 66 I+090 05
    36124 09 073A   2701 G 20100829064927900 17 25 0752992+645534 27 S
    36124 09 073A   2701 G 20100829064931570 17 25 0745992+651214 97 S
    36869 10 039B   2701 G 20100829082018750 17 25 0456146-051755 57 R
    36869 10 039B   2701 G 20100829082038360 17 25 0501415-054173 37 R+085 05
    36869 10 039B   2701 G 20100829082102900 17 25 0508064-061315 37 R+080 05
    36869 10 039B   2701 G 20100829082246210 17 25 0537208-083122 66 R+090 05
    36514 10 015A   2701 G 20100829083455900 17 25 0514920-065634 97 S
    
    IOD format: http://www.satobs.org/position/IODformat.html
    
    Site 2701: 43.68764 N, 79.39243 W, 230 m
    
    Instrument: 25 X 100 binoculars
    
    Ted Molczan
    
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