Orbital Mechanics

Just starting to think about how I can simulate the spacecraft orbiting the Earth. ┬áSure, I can draw some pretty little ellipses on the screen, but I’d like that to have some relationship with the actual orbital path of a spacecraft. ┬áMy understanding of orbital mechanics is pretty limited at this point, and I’m planning on spending most of this evening studying. Till then, here’s a nice diagram of what I have to simulate: