The ESA’s Hera mission takes flight toward the asteroid deflected by NASA’s DART probe two years ago

Hera and its two CubeSats are leaving Earth on October 7th. ESA, CC BY

The European Space Agency’s Hera mission will set off from Cape Canaveral on 7 October on a SpaceX Falcon 9 rocket. It will travel several hundred million kilometres to reach the double asteroid Didymos in autumn 2026.

This is the follow-up of the intentional impact of NASA’s DART probe onto the smaller body of this double asteroid, the moon called Dimorphos. This first-ever asteroid deflection test aims at modifying the trajectory of the target and understanding precisely what went on. And we already know quite a few things about the success of this deflection – thanks to a camera on-board DART, an Italian minisatellite (or CubeSat) deployed before impact, the combined power of ground-based telescopes, and the sharp eyes of Hubble and James Webb Space Telescope (JWST).