Lithobraking

Beagle 2 has successfully completed its critical lithobraking maneuver, marking another step for robotkind.

In a big impact there is not enough time for the ejecta to radiatively cool in transit, so that reëntry (either aerobraking in the atmosphere or lithobraking at the surface) further heats already hot ejecta.

I don't want us on a freeflight trajectory that entails lithobraking if we lose power and can't get the sail back.