The use of a kinetic impactor is one strategy to deflect objects that might be on an Earth impact trajectory. NASA's Double Asteroid Redirection Test (DART) is the first planetary defense test mission, which demonstrated a kinetic impactor technology on a non-threatening binary asteroid called (65803) Didymos. At 23:14 UTC on Sept 26, 2022, the 579-kg DART spacecraft impacted the secondary of the Didymos system, Dimorphos, at 6.14 km/s, within 25 m of the center-of-figure [1]. This impact resulted in massive streams of ejecta that contributed to a reduction in the binary orbital period by 33.0 +/- 1.0 (3?) minutes, which was measured via ground-based telescopes and radar [2]. This work explores computing the momentum enhancement factor (?), which is a measurement of the effectiveness of the kinetic impact, and is the ratio of momentum transferred to the target (?PT ) to the impactor momentum (?Pi ).
Impact Modeling Results of the Deflection Efficiency Resulting from the DART Impact
A Rossi;
2023
Abstract
The use of a kinetic impactor is one strategy to deflect objects that might be on an Earth impact trajectory. NASA's Double Asteroid Redirection Test (DART) is the first planetary defense test mission, which demonstrated a kinetic impactor technology on a non-threatening binary asteroid called (65803) Didymos. At 23:14 UTC on Sept 26, 2022, the 579-kg DART spacecraft impacted the secondary of the Didymos system, Dimorphos, at 6.14 km/s, within 25 m of the center-of-figure [1]. This impact resulted in massive streams of ejecta that contributed to a reduction in the binary orbital period by 33.0 +/- 1.0 (3?) minutes, which was measured via ground-based telescopes and radar [2]. This work explores computing the momentum enhancement factor (?), which is a measurement of the effectiveness of the kinetic impact, and is the ratio of momentum transferred to the target (?PT ) to the impactor momentum (?Pi ).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
