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About initial conditions

  1. Jul 23, 2007 #1
    Hi guys, help me.

    I have a code for integrate the equations of motion of three bodies in a inertial frame, and in cartesian coordinates (x, y, z, vxi, vyi, vzi), i=1,2,3.
    The question is, how can i use the data of JPL Horizons to obtain positions and velocities in a inertial frame? :surprised
  2. jcsd
  3. Jul 24, 2007 #2


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    Here's a short tutorial I wrote for my program, Gravity Simulator

    But you can use the data for your own program as well.
    This describes the e-mail method. In addition, Horizons also offers Telnet and Web based services.
  4. Jul 24, 2007 #3
    Thank you tony. I will read this tutorial.
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