26.09.2022

ESA to capture light from deflected asteroid’s new plume

On 26 September, NASA will purposefully crash their DART spacecraft into the 160 m wide Dimorphos asteroid, in the first-ever test of deflection by means of ‘kinetic impact’. The moment the spacecraft collides with the asteroid a plume of material is expected to be thrown into space, which will tell us a great deal about the rock’s composition and how much energy has been transferred to it by the collision. ESA will contribute significantly to ground-based observations of the new plume, as telescopes contracted by the Agency’s Near-Earth Object Coordination Centre get ready to witness history.

Over the past few years, astronomers have been very busy observing a pair of gravitationally bound asteroids, together in orbit around the Sun, to get precise data on their orbits. Dimorphos is the smaller ‘moonlet’ of the binary system, which orbits the larger, central asteroid, Didymos.

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