The European Space Agency (ESA) is Europe’s gateway to space. Its mission is to shape the development of Europe’s space capability and ensure that investment in space continues to deliver benefits to the citizens of Europe and the world.
Find out more about space activities in our 23 Member States, and understand how ESA works together with their national agencies, institutions and organisations.
Exploring our Solar System and unlocking the secrets of the Universe
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Go to topicMaking space accessible and developing the technologies for the future
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Didymos is a binary asteroid in solar orbit extending out beyond Mars. The primary mountain-sized body has a diameter of around 780 m and a rotation period of 2.26 hours. The secondary body, Dimorphos, has a diameter of around 151 m, similar to the Great Pyramid of Giza, and orbits the primary at a distance of around 1.1 km from the primary surface in around 11 hours and 22 minutes (reduced by 33 minutes after DART's impact).