Re: Problems with J002E3 elements

From: Björn Gimle (b_gimle@algonet.se)
Date: Sat Mar 29 2003 - 16:23:19 EST

  • Next message: Tony Beresford: "Re: Problems with J002E3 elements"

    "...J002E3 Elements in TLE form:
    1 99999U 99999A   03 84.00000000 -.00000000 +00000-0 +00000-0 0 00010
    2 99999  25.3923  10.1760 3728026 257.3057 298.1392  0.01771572000007
    
    Be warned that the satellite motion model for TLEs was never really meant
    to handle objects in orbits like this"
    
    "
    30 Mar 2003  13 31 58.415   -06 05 03.76  0.0030 1.0015 165.0 14.3
    31 Mar 2003  14 14 20.647   -10 46 25.13  0.0029 1.0014 154.7 14.5
    "
    
    SkyMap gives from Earth Centre at 30 Mar 00 UT 13:28 -5 32' range 474280
    km
    
    >
    > > (http://www.projectpluto.com/j002e3.htm) and used the orbital
    elements
    > > there to try and create a chart using my planetarium charting program
    > > MegaStar. However the value of 'a' or the semi-major axis is given in
    > > kilometers rather than as a fraction. When I convert that figure to
    AUs
    > > and input it into my charting program I get a value that gives me a
    > > totally incorrect position for J002E3.
    >
    > The orbital elements on the web page are geocentric -- could MegaStar
    > be assuming the elements are heliocentric?
    >
    
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