QuoteBut to capture a mountain moving at orbital speed will take more than anything made so far.Given enough time one can bring any (almost) asteroid in orbit by attaching rockets to it. But picking those that almost have the right orbit will be most fuel efficient.
But to capture a mountain moving at orbital speed will take more than anything made so far.
I agree about the time element. But if the rockets don't use some of the asteroid for the main reaction mass (and solar power) there's no way to afford lifting enough to make a real difference.
Maybe there's a way to use solar sails even. MIT students suggest using white paint to force asteroids to higher (slower) orbits for safety but to me that's just setting up future problems.