Could someone please help with this spring energy question?

A package of m 5 kg sits at the equator of an airless asteroid of m 4.0e20 kg and radius 2.5e5 m. We want to launch the package in such a way that it will never come back, and when it is very far from the asteroid it will be traveling with speed 176 m/s. We have a large and powerful spring whose stiffness is 2.5e5 N/m. How much must we compress the spring?