Hera Spacecraft Completes Second Braking Maneuver
The European Space Agency prepares for a November arrival at the Dimorphos asteroid system.
Updated on Oct. 25, 2026 in Space
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The European Space Agency has successfully executed the second braking maneuver for the Hera spacecraft as it approaches its target. This critical operation reduced the probe's relative velocity by 70 meters per second to prepare for a November rendezvous.
Why it matters
Braking is essential to synchronize the spacecraft's speed with the Didymos and Dimorphos system, ensuring a controlled arrival. This mission will allow researchers to study the impact site created by NASA's DART spacecraft in 2022.
The maneuver involved a 31-minute thruster firing at a distance of 2,300 kilometers from the target. Hera, which carries 12 instruments, has reduced its cruise velocity to 20 meters per second for its approach.
The players
European Space Agency
This intergovernmental organization is dedicated to the exploration of space and manages the development and operation of the Hera mission.
NASA
This United States government agency is responsible for the civilian space program and famously launched the DART mission to impact Dimorphos.
The details
The thruster burn was split into a morning phase followed by a performance cross-check, with the final 10 percent completed in the afternoon. Upon arrival, the spacecraft is slated to deploy two CubeSats, named Juventas and Milani, to survey Dimorphos, which measures between 160 and 170 meters in diameter.
Timeline
October 15, 2026: The first braking maneuver occurred.
October 22, 2026: The second braking maneuver occurred.
The coming week: Three transition maneuvers are scheduled.
November 2026: Hera is expected to arrive at Dimorphos.
The Big Picture
The Hera mission marks a fundamental shift in planetary defense research by transitioning from kinetic impact testing to detailed post-impact site analysis. This study builds directly upon the 2022 DART impact on Dimorphos to provide the first close-up look at a human-altered asteroid.
Data gathered by the 12 instruments on Hera will refine models for future asteroid deflection strategies. This scientific progress improves our collective ability to protect Earth from potential near-Earth object threats in the future.
The takeaway
This successful maneuver brings the spacecraft closer to providing high-resolution data on asteroid structural composition. Scientists anticipate that these findings will provide critical insights into how binary asteroid systems respond to high-velocity impacts.
What happens next
The European Space Agency has scheduled three transition maneuvers during the coming week to further refine the spacecraft's trajectory ahead of its November 2026 arrival.
Further reading
For additional context on orbital missions and exploration, visit the Space section.
Source note: This article includes information reported by Starlust.
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