On 26th September 2022, the NASA's DART spacecraft intentionally impacted Dimorphos, the secondary member of the Didymos system, successfully demonstrating the first planetary defense test in space . ESA's Hera mission will then visit the Didymos system in late 2026 for a thorough evaluation of the aftermath of NASA's DART impact . DART's impact exceeded the expectations of the kinetic-impactor technique, showing that the ejecta generated from the impact enhanced the momentum exchange, making this technique an effective deflection method for rubble-pile asteroids . Extensively observed by the Italian CubeSat (LICIACube) and several ground-based telescopes , the tail has lasted for several months. On the basis of observations made on December 28th, 2022 , it appears to have started to fade. In this study, the N-Body planetary code goNEAR is used to simulate the ejecta dynamics. The tail's morphology and geometry are highly dependent on the acceleration effects of Solar-Radiation Pressure (SRP).
FATE OF THE DART IMPACT EJECTA: INTERPRETATION OF THE TAIL MORPHOLOGY UNDER THE EFFECT OF THE SOLAR RADIATION PRESSURE ACCELERATION.
A Rossi;
2023
Abstract
On 26th September 2022, the NASA's DART spacecraft intentionally impacted Dimorphos, the secondary member of the Didymos system, successfully demonstrating the first planetary defense test in space . ESA's Hera mission will then visit the Didymos system in late 2026 for a thorough evaluation of the aftermath of NASA's DART impact . DART's impact exceeded the expectations of the kinetic-impactor technique, showing that the ejecta generated from the impact enhanced the momentum exchange, making this technique an effective deflection method for rubble-pile asteroids . Extensively observed by the Italian CubeSat (LICIACube) and several ground-based telescopes , the tail has lasted for several months. On the basis of observations made on December 28th, 2022 , it appears to have started to fade. In this study, the N-Body planetary code goNEAR is used to simulate the ejecta dynamics. The tail's morphology and geometry are highly dependent on the acceleration effects of Solar-Radiation Pressure (SRP).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
