According to the Associated Press, the BepiColombo spacecraft successfully separated its joint European and Japanese space probes from their carrier module on Thursday, marking a critical milestone nearly a decade into its journey to Mercury. The separation occurred while the spacecraft was roughly 3,3 juta kilometer from Mercury and more than 200 juta kilometer away from mission controllers on Earth.
Executing High-Risk Orbital Insertion Maneuvers Near the Sun
Flight controllers at the European Space Agency (ESA) control center in Germany waited approximately two hours to receive radio confirmation that the operation went according to plan. According to Agence France-Presse (AFP) reporting, ESA officials describe this arrival phase as one of the most technically challenging operational sequences ever attempted because Mercury’s weak gravity requires extreme speed precision. Santa Martinez, ESA’s BepiColombo mission manager, told AFP that the project is exceptionally ambitious.
Did you know? Reaching the innermost planet requires a counterintuitive journey. Because Mercury sits so close to the Sun’s immense gravity well, spacecraft cannot fly straight there; instead, they must brake using repeated planetary flybys to shed orbital energy.
Ten Billion Kilometers and Nine Planetary Flybys
Launched in 2018, BepiColombo has logged more than 10 miliar kilometer via an indirect route designed to bleed off excess speed. According to mission records, the spacecraft executed nine planetary flybys—with the final flyby concluding in January 2025—generating detailed imagery of impact craters and volcanic plains across Mercury’s surface. Ignacio Tanco, head of ESA’s inner solar system mission operations, noted that communication lags reach up to 30 minutes, forcing the spacecraft to execute mechanical separation autonomously by cutting four retaining brackets and using springs to push the modules apart at about 40 centimeters per second.
Two Distinct Scientific Orbits and Future Timelines
If current trajectories hold, BepiColombo will enter Mercury’s orbit in November, followed by a secondary separation on December 9–10 to establish independent science orbits. Elsa Montagnon, an ESA module operations official, confirmed that the spacecraft completed its expected configuration reset when signal confirmation arrived at 13:53 GMT. Once fully deployed, ESA’s Mercury Planetary Orbiter (MPO) will approach within 480 kilometers to map the surface and internal structure, while Japan’s Mercury Magnetospheric Orbiter (Mio) will study the planet’s magnetic field and magnetosphere from an elliptical path.
Frequently Asked Questions
When did BepiColombo launch?
The spacecraft launched from Earth in 2018, according to mission data.
When will the spacecraft enter Mercury’s orbit?
BepiColombo is scheduled to enter orbit around Mercury in November, with final scientific probe separations slated for December, according to ESA updates.
What are the two science probes aboard the mission?
The mission carries ESA’s Mercury Planetary Orbiter (MPO) and Japan’s Mercury Magnetospheric Orbiter (Mio), designed to study the planet’s surface, internal structure, and surrounding magnetic environment.
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