On Thu, Feb 18, 2016 at 11:55:33PM -0800, xxxxxx@shadowgard.com wrote:
> Earth's orbital velocity is about 30 km/sec.

As has been said many times before: per canon, your position at jump
exit relative to your intended target varies by much less than you
seem to believe.

There is also no basis for the calculation you keep seeming to want to
do.  Nothing in published material or any known physics requires that
jump emergence points be fixed relative to the star.  The planet's
velocity relative to the star is thus completely irrelevant.

- Tim