NASA spacecraft ready to grab sample from spinning asteroid

The video discusses the Asteroid Impact and Deflection Assessment (AIDA) collaboration, focusing on the Didimus asteroid pair. The larger asteroid, Didimus, and its smaller moon, Dimorphos, are not a threat to Earth but serve as a test for planetary defense strategies. NASA's DART mission aims to impact Dimorphos to study orbit changes, with the event recorded by a companion satellite. The European Space Agency's Hera mission will follow up in 2026 to map the impact crater and measure Dimorphos' mass, deploying additional satellites for detailed analysis.

How will astronomers measure the change in the orbit of Dimorphos?

What will the European Space Agency's mission, Hera, accomplish?