The odds of any toroidal planet forming might be infinitesimally small yet nonzero; allowing for an infinite universe, not only would a 'donut-shaped planet' almost certainly be bound to occur during the stelliferous era, it would occur infinitely often. - Wikipedia
A kitty in a tiny spacecraft that has a mass of 1000kg is traveling towards a torus-shaped planet moving only on its axis of revolution. She is currently 50000m away from its Lagrange point flying 0.05m/s. This planet has a mass 1.3 * 10^21 kg, major radius (a.k.a radius of revolution) of 300000m, and minor radius ("tube radius") of 200000m. Assuming the planet is perfectly symmetrical, what will be her speed when she travels 100000m?
