Hera successfully completes key maneuver on path to Didymos system

The Hera mission of the European Space Agency (ESA) successfully completed a two-phase deep space maneuver in February, marking a critical milestone in its journey toward the Didymos binary asteroid system, which it is expected to reach in November 2026. The operation adjusted the spacecraft’s trajectory, ensuring it will intercept the asteroid later this year—ahead of schedule.

Deep space maneuvers are propulsive operations carried out once a spacecraft is far from Earth, during its interplanetary cruise phase. They are a type of advanced trajectory control and navigation technique used to fine-tune the flight path and ensure maximum precision at the point of intercept. In Hera’s case, this correction was essential not only to ensure the spacecraft’s arrival at Didymos, but also to bring that arrival forward, thereby extending the mission’s overall duration.

To ensure maximum execution accuracy, the maneuver was split into two phases. The first burn took place on February 12 and accounted for the majority of the total maneuver, lasting approximately one hour. In the following days, ground-based flight dynamics and operations teams reconstructed the post-maneuver trajectory with high precision, using advanced deep space navigation techniques, and refined the correction maneuver to achieve unprecedented levels of accuracy at such distances from Earth. 

Since its launch in 2024, GMV has played a key role in the Hera mission, leading an international industrial consortium. The company is responsible for designing and developing the guidance, navigation, and control (GNC) system, as well as conducting mission analysis near the target asteroids. GMV is also collaborating with France’s CNES (Centre National d’Études Spatiales) in Toulouse on the CubeSat Flight Dynamics and Science Operations Centre, which will manage the control, planning, and execution of Hera’s CubeSats, including Juventas. GMV has been instrumental in developing Hera’s operational simulator and providing mission control support. 

Following this maneuver, the Hera team will carry out the mission’s most extensive asteroid operations validation campaign, with the goal of rigorously verifying all procedures to be executed during the mission in order to achieve its ambitious scientific objectives. To support this effort, GMV experts will be deployed to ESA’s European Space Operations Centre (ESOC) in Darmstadt, Germany, where they will work on site alongside the Hera team, actively contributing to the execution of operational rehearsals. Their involvement is critical to ensuring the correct performance of the GNC system and the validation of navigation parameters in the vicinity of the asteroid.

The Hera mission represents a major step forward in planetary defense, as it will conduct a detailed study of the effects of the kinetic impact previously carried out by NASA’s DART mission. At the same time, it will deliver valuable scientific data on the formation and evolution of asteroids and, by extension, the solar system. Having successfully completed this maneuver, Hera continues its interplanetary journey, locking in its trajectory toward one of the most monumental achievements in European space exploration.uropea.