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BEAST aims to modify the orbital period of the small secondary object of a binary asteroid by kinetic impact. BEAST analyses a commercial LEO platform accommodating as payload the impactor and GNC system with total mission cost below 150 M€.
The objective of the Cobra mission is to use a conventional chemical thruster to modify the orbit of a man-made object through plume impingement. The proposed concept uses a standard satellite platform with a modified payload to suit mission needs.

Low energy transfers have shown that it is possible to reduce the ∆v cost (and therefore the propellant mass) for a number of transfer types. This is possible by exploiting the natural n-body dynamics characterizing the spacecraft motion within the Solar System. In particular, the concept of ballistic capture makes it possible to reduce the hyperbolic excess velocity upon moon/plant arrival, and allows the spacecraft to perform few orbits at zero cost. Low energy transfers are designed by using impulsive maneuver, and therefore they inherently use chemical propulsion (Figure 1).