When complete, it would travel from Earth to Mars on a 270 day Hohmann trajectory and maneuver into Martian orbit.[2] Afterwards, a landing craft would descend to the surface for a one-year expedition.[2] Return to Earth would take 270 days and the re-entry vehicle would weight 15 metric tons.[2]
See also
Aelita project, a 1969 Soviet project of a human mission to Mars