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An understanding of the post-impact dynamics of ejecta clouds are crucial to the planning of a kinetic impact mission to an asteroid, and also has great implications for the history of planetary formation. The purpose of this article to…

Earth and Planetary Astrophysics · Physics 2016-11-15 Yang Yu , Patrick Michel , Stephen R. Schwartz , Shantanu P. Naidu , Lance A. M. Benner

On 26 September 2022, the NASA Double Asteroid Redirection Test (DART) spacecraft impacted Dimorphos, the secondary component of the binary asteroid (65803)~Didymos. This experiment tested the Kinetic Impactor technology for diverting…

Earth and Planetary Astrophysics · Physics 2026-01-09 Josef Durech , Petr Pravec , Masatoshi Hirabayashi , Derek C. Richardson , Harrison Agrusa , Ryota Nakano

On 2022 September 26th, 23:14 UT the NASA/DART (Double Asteroid Redirection Test) spacecraft successfully impacted Dimorphos, the secondary component of the binary (65803) Didymos system, demonstrating asteroid orbit deflection for the…

Earth and Planetary Astrophysics · Physics 2024-02-07 Fernando Moreno , Gonzalo Tancredi , Adriano Campo Bagatin

The DART spacecraft will impact Didymos's secondary, Dimorphos, at the end of 2022 and cause a change in the orbital period of the secondary. For simplicity, most previous numerical simulations of the impact used a spherical projectile…

Earth and Planetary Astrophysics · Physics 2022-01-06 S. D. Raducan , M. Jutzi , T. M. Davison , M. E. DeCoster , D. M. Graninger , J. M. Owen , A. M. Stickle , G. S. Collins

Didymos and Dimorphos are primary and secondary, respectively, asteroids who compose a binary system that make up the set of Near Earth Asteroids (NEAs). They are targets of the Double Asteroid Redirection Test (DART), the first test…

Earth and Planetary Astrophysics · Physics 2023-07-19 R. Machado Oliveira , O. C. Winter , R. Sfair , G. Valvano , T. S. Moura , G. Borderes-Motta

NASA's DART and ESA's Hera missions offer a unique opportunity to investigate the delivery of impact ejecta to other celestial bodies. We performed ejecta dynamical simulations using 3 million particles categorized into three size…

Earth and Planetary Astrophysics · Physics 2024-09-02 Eloy Peña-Asensio , Michael Küppers , Josep M. Trigo-Rodríguez , Albert Rimola

We report observations of the Didymos-Dimorphos binary asteroid system using the Atacama Large Millimeter/Submillimeter Array (ALMA) and the Atacama Compact Array (ACA) in support of the Double Asteroid Redirection Test (DART) mission. Our…

The DART spacecraft is planned to impact the secondary of the binary asteroid (65803) Didymos in 2022, to assess deflection strategies for planetary defense. The impact will create a crater and release asteroidal material, some of which…

Earth and Planetary Astrophysics · Physics 2020-03-05 Paul Wiegert

The Double Asteroid Redirection Test (DART) mission will be the first test of a kinetic impactor as a means of planetary defense. In late 2022, DART will collide with Dimorphos, the secondary in the Didymos binary asteroid system. The…

On September 26, 2022, NASA's Double Asteroid Redirection Test (DART) mission successfully impacted Dimorphos, the natural satellite of the binary near-Earth asteroid (65803) Didymos. Numerical simulations of the impact provide a means to…

ESA's Hera mission aims to visit binary asteroid Didymos in late 2026, investigating its physical characteristics and the result of NASA's impact by the DART spacecraft in more detail. Two CubeSats on-board Hera plan to perform a ballistic…

Instrumentation and Methods for Astrophysics · Physics 2023-11-01 Iosto Fodde , Jinglang Feng , Massimiliano Vasile , Jesús Gil-Fernández

With the successful impact of the NASA DART spacecraft in the Didymos-Dimorphos binary asteroid system, we provide an initial analysis of the post-impact perturbed binary asteroid dynamics. To compare our simulation results with…

In 2022 the DART mission spacecraft impacted the asteroid Dimorphos, the secondary body of the binary Didymos system, ejecting a large number of dust particles, rocks and boulders. The ESA Hera mission will reach the system in 2026 for…

Earth and Planetary Astrophysics · Physics 2024-02-08 Krzysztof Langner , Francesco Marzari , Alessandro Rossi , Giovanni Zanotti

On September 26, 2022, NASA's DART spacecraft impacted Dimorphos, the secondary asteroid in the (65803) Didymos system, so that the efficiency with which a satellite could divert an asteroid could be measured from the change in the system's…

Earth and Planetary Astrophysics · Physics 2023-08-31 Taylor Gudebski , Elisabeth Heldridge , Brady McGawn , Elle O Hill , Jonathan J. Swift , Henry Zhou

Hera represents the European Space Agency's inaugural planetary defense space mission and plays a pivotal role in the Asteroid Impact and Deflection Assessment international collaboration with NASA DART mission that performed the first…

This paper presents a quantitative study of the evolution of the ejecta cloud released from a hypervelocity impact on a binary asteroid. We performed numerical simulations of the post-impact dynamics of the ejecta cloud in the framework of…

Earth and Planetary Astrophysics · Physics 2018-05-16 Yang Yu , Patrick Michel

The Near-Earth binary asteroid Didymos was the target of a planetary defense demonstration mission DART in September 2022. The smaller binary component, Dimorphos, was impacted by the spacecraft in order to measure momentum transfer in…

Target of NASA's DART mission, the system of Didymos and Dimorphos will once again be visited by a space mission -- ESA's Hera mission, scheduled to be launch in 2024. Hera will arrive in the system approximately 4 years after the DART…

Earth and Planetary Astrophysics · Physics 2024-02-07 Gustavo Madeira , Sebastien Charnoz , Nicolas Rambaux , Philippe Robutel

We used the times of occultations and eclipses between the components of the 65803 Didymos binary system observed in its lightcurves from 2003-2021 to estimate the orbital parameters of Dimorphos relative to Didymos. We employed a weighted…