With ionic motors? or chemical engines? liquid propellant (LH2) or gas? What is the most compact way to make the trip? in the smallest possible rocket, for example the SS-520-5 is a 2-stage rocket, 11.5m high and 50cm in diameter, that can launch loads of up to 1.3kg to LEO, a variant of that to launch 300 / 350kg and we could launch a probe propelled by ionic motors. what do you think?