Planetary Mission Operations
BepiColombo begins its Mercury arrival
Two deep-space antennas confirmed the successful separation of the mission's cruise module after an eight-year interplanetary journey.
Briefed September 4, 2026 · Aliens in the Clouds
Confirmed Mission Milestone
ESA reported that BepiColombo's Mercury Transfer Module separated successfully from the stacked Mercury Planetary Orbiter and JAXA's Mio spacecraft on September 3. Deep-space antennas in Cebreros, Spain, and Malargüe, Argentina, acquired the expected signal, telemetry showed nominal systems, and the MPO solar arrays were charging the combined spacecraft's batteries.
The maneuver ends the solar-electric cruise phase and begins a long arrival sequence rather than completing it. The spacecraft stack is scheduled for Mercury orbit insertion beginning November 21, followed by separation of the two science orbiters in December and final positioning through March 2027. Full science operations are planned for April 2027; no new Mercury result was announced with the separation.
Why it matters
Successful planetary navigation expands the instrumented context for unusual space and plasma observations, but an engineering milestone should not be mistaken for a scientific discovery.
What the source establishes
Confirmed in ESA telemetry and dual-station signal acquisition. Orbit capture, spacecraft separation, commissioning, and science performance remain future milestones.
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