26 November 2024 11:32:00.420 AM initial_orbit(): Fortran90 version This simulation follows a small body for two orbits around a relatively massive body - such as Mercury around the sun. Kepler's equations for a two body system are used. Note that the orbit is NOT an ellipse. But that's OK, because the planet is far from its equilibrium orbit. Use rkf45() for the ODE integrator. Created data file "initial_orbit_data.txt". Created command file "initial_orbit_commands.txt". initial_orbit() Normal end of execution. 26 November 2024 11:32:00.421 AM