[1] Because of the low gravity, the lander would be anchored to the surface during sample collection and launch of the Earth Re-entry Capsule (ERC).
In August 2015, the ESA-Roscosmos working group on post-ExoMars cooperation, completed a joint study for a possible future Phobos Sample Return mission, and preliminary discussions were held.
[4][5] The top-level science goal is to understand the formation of the Martian moons Phobos and Deimos and put constraints on the evolution of the Solar System (co-formation, capture, impact ejecta).
[6] Currently, engineers at ESA are leaning toward four cantilever-type landing legs with crushable aluminium honeycomb shock absorber and secondary load limiters.
[1] The concept of the Phootprint spacecraft is still preliminary and composed by three modules:[6] As of 2014[update], the conceptual 30 kg (66.1 lb) payload is:[3] The proposed mission architecture is:[7]