[Tutor] Problems using odeint

[eryksun]

On Wed, Jan 15, 2014 at 1:42 AM, eryksun <eryksun at gmail.com> wrote:
>
> The trajectory is decaying into the planet. In real life it hits the
> surface.

Not quite. A radius of 1.4 km is inside the planet, so that's
unrealistic from the start. If it starts at the surface of Mars, at
around 3,400 km, then the satellite needs at least the following
escape velocity:

    >>> (2 * G * Mm / 3.4e6) ** 0.5
    5019.788430038953

Otherwise it eventually crashes back on the surface.