This is a little OT, sorry.
Hypothetical situation. :-) An asteroid massing 50 trillion metric tons in the main belt. I apply 10^19 joules of energy, a push so to speak. Via rocket or whatever. At a vector down the gravity well of the sun, towards earth. If I want to calculate the...
Project Daedalus
In the 1970's the British Planetary Society wrote up a rather detailed study called Project Daedalus powered by lasers zapping pellets of deuterium causing small thermonuclear explosions resulting in a hot plasma which was used for thrust in an interstellar vehicle. I can't...