We've described here the basics of a two-body orbit calculation, but there are a number of corrections that would need to be made to make a more accurate calculation; for example: The orbital elements...We've described here the basics of a two-body orbit calculation, but there are a number of corrections that would need to be made to make a more accurate calculation; for example: The orbital elements change with time - notably the longitude of the ascending node Ω and the argument of pericenter ω. Parallax corrections: the position of the body in the sky varies slightly depending on the position of the observer on the surface of the Earth.
