Celestia Forums

I'm experimenting with double planet systems.

I know how to calculate mean distances to center of mass. What I'm not so sure about is orbit eccentricity : is it the same for both planets? If not, how can one be calculated from the other?

Yes, the eccentricity will be the same, and the longitude of perihelion will be opposite (180 degrees) of each other.

Thanks

Zadukk wrote:Thanks

Any time