- #1

ckirmser

- 105

- 3

Hello, all -

I'm trying to come up with a general formula to determine the travel time for a spaceship to travel from one planet in orbit around a star to another planet in a different orbit.

I can't just use a straight-line measurement and then apply a standard T=2*sqr(D/A) (for a midpoint turnaround and then applying thrust in the reverse direction to slow down, reaching V=0 at the destination), because the destination planet will have moved in its orbit which may increase or decrease the length of that direct line as the ship travels.

I figure it will involve the initial angular separation of the two planets, but I don't know for sure.

I looked at a Hohman transfer, but that seemed to be designed for a ship at a constant velocity, not one under acceleration.

Any ideas?

Thanx in advance for any help.