jeremy-penn / orbital_mechanics Goto Github PK

I was going through this repo and I noticed that the eccentricity equations in coe_from_rv and kepler_convert are incorrect compared to those listed in Curtis's textbook.
The current equation is E = (1 / mu)*((v^2 - (mu / r))*R - vr*V);
Whereas the equation according to the textbook is E = (1 / mu)*((v^2 - (mu / r))*R - r*vr*V);

The equation in the file is missing the position vector in the last term.

1. Modify existing framework to simulate binary orbits