As of mid-2018, the AIDA mission has been partly approved. The NASA Double Asteroid Redirection Test ("DART") kinetic impactor spacecraft has entered phase C (detailed definition). The goal is to impact the asteroidal moon of near-Earth Asteroid 65803 Didymos, nicknamed "Didymoon". The impact will occur in October 2022 when Didymos is relatively close to Earth, allowing Earth-based telescopes and planetary radar to observe the event. The result of the impact will be to change the orbital velocity and hence orbital period of Didymoon, by a large enough amount that it can be measured from Earth. This will show for the first time that it is possible to change the orbit of a small asteroid, around the size most likely to require active mitigation in the future. The second part of the AIDA missionthe ESA HERA spacecrafthas entered phase B (Preliminary Definition) and requires approval by ESA member states in October 2019. If approved, it would reach the Didymos system in 2024 and measure both the mass of "Didymoon" and the precise effect of the impact on that body, allowing much better extrapolation of the AIDA mission to other targets.