The target of the Hera mission is asteroid 65803 Didymos (1996 GT), an Apollo-type rocky (S-type, for astronomers) near-Earth object (NEO) with a perihelion (minimum distance to the Sun) that is just below the aphelion radius (maximum distance to the Sun) of Earth orbit. The DART spacecraft will impact the satellite, causing changes in the binary orbit that will be measured by Earth-based observers. After being launched in 2021, in autumn 2022 the DART spacecraft will impact Dimorphos, the secondary member of the (65803) Didymos binary asteroid. 5 The target is a moonlet of 65803 Didymos… With a mass of 650 kg and an impact velocity of about 6.6 km/s, DART is expected to change the Schematic of the DART mission shows the impact on the moonlet of asteroid (65803) Didymos. Post-impact observations from Earth-based optical … A half-ton chunk of metal will launch in July 2021 and make its way toward 65803 Didymos, a binary asteroid (made up of one big asteroid orbited by a smaller “moonlet”). AIDA will be the first space experiment to demonstrate asteroid impact hazard mitigation by using a kinetic impactor to deflect an asteroid. Greek for "twin", this rapid-rotator Amor possesses a satellite with an orbital period of 11.9 hr. Post-impact observations from Earth-based optical … Credits: NASA/Johns Hopkins Applied Physics Lab. The Asteroid Impact and Deflection Assessment mission is a partnership between NASA and ESA. Credits: NASA/Johns Hopkins Applied Physics Lab Simulations carried out by leading space agencies have concluded. Post-impact observations from Earth-based optical telescopes and planetary radar would, in turn, measure the change in the moonlet’s orbit about the parent body. 65803 Didymos : Discovered 1996 Apr. prevent the impact of Earth with a hazardous object [1]. Naidu a, *, L.A.M ... 2016), which is a planetary defense experiment. Post-impact observations from Earth-based optical telescopes and planetary radar would, in turn, measure the change in the moonlet’s orbit about the parent body. Suspicions arose in the Goldstone delay-Doppler echoes, and these were confirmed with the optical light curve analysis, along with Arecibo radar imaging on 2003 Nov. 23. Schematic of the DART mission shows the impact on the moonlet of asteroid (65803) Didymos. The binary near-Earth asteroid (65803) Didymos is a planned target for the Asteroid Impact & Deflection Assessment (AIDA) mission. 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