The Martian Moons eXploration (MMX) mission is JAXA’s lead mission that plans to survey and explore Mars’ two moons, Phobos and Deimos. While the Japanese agency will build the main payload, the German Space Agency (DLR) and the National Centre for Space Studies (CNES) will contribute to the mission. “IDEFIX,” a small secondary payload, will ride with MMX and is planned to touch down on the surface of Phobos in 2029.
IDEFIX recently finished construction, and DLR and CNES are set to deliver the rover to JAXA for integration with the MMX mission.