The Hera mission is a part of AIDA (Asteroid Impact and Deflection Assessment), founded upon international cooperation between NASA and ESA, who are working together towards a single goal: to perform a demonstration mission that should deflect an asteroid’s orbit and thereby prevent its impact with Earth. First, the DART spacecraft from NASA, which was launched in November 2021, will travel to Didymos, a binary asteroid system consisting of a larger body (approximately 800 m in diameter) and its satellite, a smaller body called Dimorphos with size of approximately 170 m. The DART will hit Dimorphos at a speed of approximately 6.6 km/s and thus try to change its orbital period. The plumes coming from this impact will also contribute to this change. The impact will be observed by ground observations from Earth, but with some help from a small CubeSat travelling on board DART. The small satellite will be deployed just before the impact in order to provide front row-seat images of the collision.

Hera will come a few years later. That launch is scheduled for 2024, and arrival at Dimorphos is currently planned in 2026. Hera will analyse the impact crater using various scientific instruments and also will measure such properties of Dimorphos as mass and material composition. Hera will also carry two small CubeSats, known as MILANI and JUVENTAS, which will assist with the scientific observations.

Her spacecraft approaching an Asteroid, The Earth at the backgroung
HERA HERA spacecraft scanning an asteroid in a close proximity


The team at OHB Czechspace is developing the probe’s complete structure providing all necessary interfaces with scientific instruments and service devices, such as solar arrays, batteries, antennae, and computer, as well as the main interface with the rocket! Our engineering team is working on the design of structural components that will be able to survive the launch of the rocket and its flight while also withstanding the inhospitable environment in space. We must as well make sure that Hera and its components will be transported safely to various assembly places around Europe and eventually also to the spaceport.


The Hera mission schedule is very challenging and we are striving to move quickly! Asteroids will not wait for us, either.

Our team has successfully passed the Preliminary Design Review in April 2021 and the Critical Design Review in December 2021.


Our customer is OHB System, a so-called prime contractor for the HERA mission.

A Team of Engineers sitting and standing at the stairs

OHB Czechspace Hera team

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