Hera
Safety & Security

Facts and figures

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ESA / Safety & Security / Hera
Hera size (without solar arrays) 2.2x2x1.8 m approx
Hera solar array area 8.7 sq. m in two wings
Hera mass up to 870 kg (fully fueled)
Hera launch date October 2024
Hera rendezvous with Didymos December 2026
Didymos binary system 780-m diameter main body; 160-m diameter secondary body
Distance between bodies 1.2 km
DART launch date Summer 2021
DART collision date September 2022

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