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In cruiseDeep space

Hera

ESA · Launch: 7 Oct 2024

Planetary-defence mission heading to the Didymos–Dimorphos asteroid pair, the target hit by NASA's DART in 2022.

Objective: Measure the crater and mass of Dimorphos to turn DART's impact into a repeatable deflection technique.

Arrival at Didymos

Dec 2026

Target date · may change

Mission details

Rocket & spacecraft
Falcon 9
Destination
Didymos & its moonlet Dimorphos
Duration
~6 months at the asteroids
  • Carries two CubeSats, Milani and Juventas, that will try to land on Dimorphos.
  • DART's 2022 impact shortened Dimorphos' orbit by about 33 minutes.
  • Completes the first planetary-defence test in history.

Milestones

2 of 3 reached
  1. Launch

    Oct 2024

  2. Mars flyby

    Mar 2025

  3. Arrival at Didymos

    Dec 2026Provisional

Future dates are agency targets, not confirmed schedules.