MMX (Martian Moons eXploration)

MMX (Martian Moons eXploration)
Name	MMX (Martian Moons eXploration)
Operator	Japan Aerospace Exploration Agency
Mission type	Sample-return, reconnaissance
Launch date	2024-08-?? (planned)
Mission duration	~4.5 years (planned)
Launch vehicle	H-IIA / H3
Crew	Uncrewed

MMX (Martian Moons eXploration) is an uncrewed Japanese space mission led by the Japan Aerospace Exploration Agency to explore the Martian moons and return samples to Earth. The project involves collaboration among the European Space Agency, National Aeronautics and Space Administration, Centre National d'Études Spatiales, and other institutions, and integrates technology and scientific objectives influenced by past missions such as Hayabusa2, Rosetta, Mars Reconnaissance Orbiter, Mars Express, and Viking program.

Mission overview

The mission overview describes launch planning, cruise, Mars arrival, moon operations, and Earth return, connecting to heritage from Hayabusa, Hayabusa2, Cassini–Huygens, Mars Odyssey, and Phobos-Grunt experiences. The flight profile uses launch vehicles and mission operations concepts familiar to Tanegashima Space Center, Tanegashima Launch Complex, Kourou Spaceport, and mission control centers like Tsukuba Space Center and European Space Operations Centre. The MMX project management draws on frameworks from NASA Headquarters, ESA Science Programme, CNES Directorate, and industrial partners including Mitsubishi Heavy Industries, JAXA, and international laboratories.

Spacecraft design and instruments

The spacecraft bus integrates subsystems developed by teams at ISAS, JAXA, DLR, CNES, and NASA Jet Propulsion Laboratory with instrumentation influenced by designs from ONERA, University of Tokyo, Tohoku University, Kyoto University, and Rikkyo University. Instruments include a high-resolution camera suite comparable to HiRISE, a visible and near-infrared spectrometer echoing OMEGA (instrument), a thermal infrared imager akin to TES (instrument), a radar subsystem inspired by SHARAD, and a sampling mechanism building on engineering from Hayabusa2 and OSIRIS-REx. Flight electronics and guidance borrow heritage from Akatsuki, Hiten, SELENE (Kaguya), and avionics suppliers tied to Mitsubishi Electric and NEC Corporation.

Mission objectives and science goals

Primary science goals aim to determine the origin of the Martian moons by testing scenarios that reference models from Giovanni Schiaparelli (astronomer), capture hypotheses linked to Phobos (moon), Deimos (moon), and formation theories analogous to debates around Theia and Moon (Earth's moon). Goals include characterizing geology, regolith, and volatile content using techniques developed in Lunar Reconnaissance Orbiter, Chandrayaan-1, MESSENGER, and Dawn investigations. Astrobiological and cosmochemical objectives connect to sample analysis practices from Martian Meteorite NWA 7034, ALH84001, Itokawa, and Ryugu studies, and aim to inform comparative planetology alongside datasets from Mars Science Laboratory, Perseverance (rover), Spirit (rover), and Opportunity (rover).

Timeline and mission phases

The timeline includes launch, cruise, Mars approach, Phobos and Deimos reconnaissance, sampling operations, Earth transfer, and Earth reentry, paralleling phase planning from Genesis (spacecraft), Stardust (spacecraft), Hayabusa2, and OSIRIS-REx. Critical mission phases reference planetary protection protocols influenced by Outer Space Treaty, sample curation concepts from Smithsonian Institution, Natural History Museum, London, and return handling frameworks used by NASA Johnson Space Center and JAXA.

Data collection and sample-return plans

Data collection integrates remote sensing, in situ measurements, and sample caching with sample-return strategy informed by Stardust, Hayabusa, and Hayabusa2 recovery campaigns and curation approaches from NASA Ames Research Center and JAXA Sagamihara Campus. The sampling system is designed to obtain surface and near-subsurface material from Phobos (moon) using mechanisms with heritage from Hayabusa2 touchdown operations, while data downlink and archival will utilize infrastructures like Deep Space Network, DSN, European Tracking Network, and planetary data systems modeled on Planetary Data System standards.

International collaboration and management

International collaboration and management involve coordination among JAXA, ESA, NASA, CNES, DLR, and academic partners including University of Tokyo, Kyoto University, ISAS, Tohoku University, and laboratories such as JPL and Institut d'Astrophysique Spatiale. Programmatic arrangements draw on agreements similar to memoranda used in International Space Station, cooperation patterns from Apollo–Soyuz Test Project, and bilateral frameworks used in BepiColombo and Cassini–Huygens. Industrial participants include Mitsubishi Heavy Industries, NEC Corporation, and subcontractors with prior roles in H-IIA and H3 Launch Vehicle missions.

Results and legacy

Expected results include returned samples that will be curated and distributed to teams working within networks comparable to NASA Astromaterials Curation Office, Smithsonian Institution, Max Planck Society laboratories, and universities such as Massachusetts Institute of Technology, California Institute of Technology, University of Cambridge, University of Oxford, and University of Tokyo. The legacy will influence future missions like proposed Phobos bases, sample-return architectures resembling Mars Sample Return (MSR), and comparative studies alongside datasets from Mars Reconnaissance Orbiter, Mars Express, Curiosity (rover), and Perseverance (rover), while contributing to planetary science communities at International Astronomical Union and archival repositories consistent with Planetary Data System practices.

Category:Japanese space probes