Launch Date September 2024
Launch Site Tanegashima Space Center, Tanegashima, Japan
Destination Phobos, Deimos
Type Orbiter, Lander, Sample Return
Status In Development
Nation Japan
Alternate Names Mars Moons eXploration


MMX (Mars Moons eXploration) will visit the two Martian moons, Phobos and Deimos, land on the surface of Phobos, and collect a surface sample. Plans are for the sample to be returned to Earth in 2029. NASA is supporting the development of one of the spacecraft’s suite of seven science instruments.


This mission is in development.

Key Dates

September 2024: Launch
August 2025: Mars Arrival
August 2028: Mars Departure
July 2029: Phobos Sample Return to Earth


Launch Vehicle: TBD

Spacecraft Mass: TBD

Spacecraft Instruments:

  1. Neutron and Gamma-ray Spectrometer (NGRS)

  2. Wide Angle Multiband Camera (WAM)

  3. Near-Infrared Spectrometer (NIRS)

  4. Telescopic Camera (TL)

  5. Light Detection and Ranging (LIDAR)

  6. Circum-Martian Dust Monitor (CMDM)

  7. Mass Spectrum Analyzer (MSA)

Additional Resources

Institute of Space and Astronautical Science and Japan Aerospace Exploration Agency: MMX

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