However, scientists estimate that an antenna array of 160 kilometres in diameter would be required to generate sufficient energy. This system attaches itself to the ECO and then proceeds to bale material from the object. The jet of material results in a propulsive effect, which pushes the ECO away from earth. A nuclear or solar power plant would be required to run the system. As with Rocket Propulsion the difficulty will be landing and gaining a sufficient hold on the ECO s surface.
Maintenance is also a factor.
It may therefore require a manned installation. This system employs giant sails that use the solar wind to drag the ECO away. The sails would have to be many kilometres wide to pull even a relatively small object. Tethering and autonomous deployment of the sails would be extremely difficult, and again a manned installation would probably be required. These systems would be most effective against comets since they comprise of large amounts of ice.