written by Juan Aguirregabiria
edited by Wolfgang Christian

The Ejs Keplerian Orbit model displays the dynamics of a mass orbiting a much larger mass subject to Newtonian gravity.  The simulation displays the motion of the smaller mass and the effective potential energy diagram.  The initial energy of the system can be changed via textbox and the initial conditions can also be changed by dragging the mass or dragging the black circle in the effect potential energy diagram.  You can modify this simulation if you have Ejs installed by right-clicking within the plot and selecting "Open Ejs Model" from the pop-up menu item.  

Ejs Keplerian Orbit model was created using the Easy Java Simulations (Ejs) modeling tool.  It is distributed as a ready-to-run (compiled) Java archive.  Double clicking the ejs_ehu_central_forces_kepler.jar file will run the program if Java is installed.  Ejs is a part of the Open Source Physics Project and is designed to make it easier to access, modify, and generate computer models.  Additional Ejs models for Newtonian mechanics are available.  They can be found by searching ComPADRE for Open Source Physics, OSP, or Ejs.

• Download ejs_central_forces_kepler.jar - 1225kb Java Archive File

Last Modified June 5, 2014

This file has previous versions.

The source code zip archive contains an XML representation of the Ejs Keplerian Orbit Model.  Unzip this archive in your Ejs workspace to compile and run this model using Ejs.

• Download ejs_ehu_central_forces_kepler.zip - 7kb Compressed File

Published September 29, 2008
Last Modified June 5, 2014

This file has previous versions.