Mio, formerly the Mercury Magnetospheric Orbiter (MMO), is JAXA's spin-stabilized BepiColombo spacecraft for investigating Mercury's magnetic field, plasma, thin atmosphere and dust. Its five instrument suites complement MPO's planetary measurements, allowing scientists to distinguish Mercury's own field from solar-wind effects. Following transfer-module separation in September 2026, Mio remains attached to and powered by MPO; deployment into its separate orbit is planned for December 2026.
Future launches and major activity directly linked to this vehicle family.
Mio, formerly the Mercury Magnetospheric Orbiter (MMO), is JAXA's spin-stabilized BepiColombo spacecraft for investigating Mercury's magnetic field, plasma, thin atmosphere and dust. Its five instrument suites complement MPO's planetary measurements, allowing scientists to distinguish Mercury's own field from solar-wind effects. Following transfer-module separation in September 2026, Mio remains attached to and powered by MPO; deployment into its separate orbit is planned for December 2026.
Future launches and major activity directly linked to this vehicle family.