RE: Phobos-Grunt and Rocket observation

From: Ted Molczan (
Date: Sat Nov 19 2011 - 16:17:27 UTC

  • Next message: Janos Tolgyesi: "Re: Phobos-Grunt and Rocket observation"

    Paul Maley wrote:
    > Continuing observations from Nov 11 (from Oklahoma City), 13 (from Houston) and 19 (tonite)
    > show Phobos-Grunt to be slowly varying in brightness and not exhibiting any obvious tumbling
    > scenario.  On Nov 19 at 11:20UT I was able to track the payload for more than 120 seconds
    > under perfect conditions and there was no change in the lack of tumbling signature. The
    > rocket body was followed for only 65 seconds but its slow variation revealed approximately
    > 25 seconds between maxima.
    This is excellent. Did you record any imagery/video from which positional obs could be reduced? If we can obtain a
    reasonable number of obs during the brief visibility window that is opening up for our most active observers, it could
    provide insights into the orbit dynamics that are difficult to tease out of finished product (TLEs).
    Ted Molczan
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