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Comment Re:So how do we miss a 300 foot object that has be (Score 1) 237

See this for a good explanation.

Delta-v from low earth orbit to the sun requires shedding 24km/s. Delta-v from earth orbit to pluto only requires 8.4km/s.

Actually you can get to the sun with far less -- something like 8.8km/s -- but it would take fantastically longer. In effect you would escape the entire solar system first, then kill your angular momentum completely.

Or you could take advantage of moon or other planet flybys, again reducing the energy required by trading it for massive amounts of time.

Comment Re:To put it into perspective (Score 2) 237

And incidentally, KSP cannot model quasisatellites, because the orbit is not just an ellipse -- it's an ellipse that shifts, due to gravitational effects from Earth and other bodies, after a given (large) number of orbits. KSP only uses true ellipses for planets and moons, and patched conics for ships and (maybe) asteroids. It doesn't use real 3-body mechanics at all.

Comment Re:To put it into perspective (Score 2, Informative) 237

This asteroid is *not* in orbit around the earth. It is a quasisatellite, like Cruithne, in a true orbit around the sun ... but in such an orbit that its distance from Earth never exceeds 19 million miles.

To reach a quasisatellite, you *will* need to leave true Earth orbit and obtain a solar orbit. Your transfer orbit will then intersect the quasisatellite's orbit, and when you get close, you will match orbits so you can land.

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