RE: UFO 9 (USA-140)

From: Ted Molczan (
Date: Thu Mar 14 2002 - 10:10:31 EST

  • Next message: Jean-Luc L. J. DIGHAYE: "Geostationary satellites"

    Ed Light commented about the rather aged 98055A / 25489 elset in Mike
    McCants' classfd.tle file:
    > While this element set will be useful for ascertaining the 
    > general position of the orbit plane, I wonder how useful an 
    > almost-two-year-old set could be for current predictions.
    The rate of decay and passage of time are such that the prediction time
    uncertainty is of the same order of magnitude as the orbital period, so
    the object will only be reacquired as the result of a successful search
    or a chance encounter.
    Including severely out of date elements serves as a reminder that the
    object is lost. As I recall, it is a faint object, so it will be a
    greater than average challenge to recover it.
    Ted Molczan
    Unsubscribe from SeeSat-L by sending a message with 'unsubscribe'
    in the SUBJECT to

    This archive was generated by hypermail 2b29 : Thu Mar 14 2002 - 10:10:07 EST