The velocity requirements to soft land on either Phobos or Deimos, the small Martian moons, are determined for the 1969 launch opportunity. A single impulse retro and plane change maneuver is applied at periapsis of the hyperbolic trajectory to achieve the desired final orbit about Mars. Less Delta-V is required to attain the orbit of Phobos. This fact, combined with the lower orbital altitude, makes Phobos the preferred target for a soft landing. The minimum Delta-V for a soft landing does not coincide with the minimum injection energy for a ballistic trajectory to Mars, so that a trajectory can be found that maximizes the payload landed on Phobos. (Author)
Velocity Requirements for a Soft Landing on Phobos or Deimos in 1969
1968
38 pages
Report
Keine Angabe
Englisch
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