08-Jan-2022 10:45:29 two_body_ode_test(): MATLAB/Octave version 9.8.0.1380330 (R2020a) Update 2 Test two_body_ode(). Parameter values: t0 = 0 y0 = (1,0,0,0.8) tstop = 7.79 initial_orbit(): MATLAB/Octave version 9.8.0.1380330 (R2020a) Update 2 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. Graphics saved as "initial_orbit.png" initial_orbit: Normal end of execution. orbital_decay() MATLAB/Octave version 9.8.0.1380330 (R2020a) Update 2 This simulation follows a small body for 20 orbits around a relatively massive body - such as Mercury around the sun. Kepler's equations for a two body system are used. Initially, the orbit is NOT an ellipse, but as time passes, the orbit decays into an elliptical shape. Graphics saved as "orbital_decay" orbital_decay: Normal end of execution. two_body_ode_test: Normal end of execution. 08-Jan-2022 10:45:34