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NASA's DART Impact Altered Asteroid's Orbit Around the Sun, Study Finds
NASA's DART mission shortened Dimorphos's orbit by 32 minutes and slowed the Didymos-Dimorphos system's solar orbit by 0.15 seconds, demonstrating kinetic impactor defense viability.
- Published March 6 in Science Advances, researchers reported the Didymos–Dimorphos system's velocity decreased by roughly 11.7 micrometers per second after the DART impact.
- NASA's DART spacecraft rammed Dimorphos in September 2022, and impact ejecta acted like an extra rocket plume, roughly doubling the momentum transfer with a beta parameter near two.
- Using 22 stellar occultations and nearly 6,000 ground-based astrometric measurements, researchers detected the orbit shrank by about 1,200 feet and 0.15 seconds.
- Despite the tiny change, teams emphasize Earth remains safely out of the asteroids' path, and the study advances planetary-defense planning with European Space Agency's Hera spacecraft arriving later this year.
- Questions remain about the impact's precise contributions, and researchers say Hera spacecraft's survey later this year will clarify Dimorphos' post-impact shape and mass, while scientists note small early impulses can accumulate over years.
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One study confirmed that the technique known as “kinetic impact” can modify the trajectory of an asteroidThis is a tool considered key to planetary defense.
·Buenos Aires, Argentina
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In 2022, a spacecraft collided with Dimorphos, and recent research has now shown that the celestial body's orbit has indeed changed.
New NASA DART mission data reveals that asteroids throw ‘cosmic snowballs’ at each other
University of Maryland-led astronomers found evidence that rocks continuously travel between Didymos and its smaller moon Dimorphos, reshaping our understanding of how near-Earth asteroids evolve over time—and how they can threaten our planet.
·Washington, United States
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Leaning Left19Leaning Right14Center58Last UpdatedBias Distribution64% Center
Bias Distribution
- 64% of the sources are Center
64% Center
L 21%
C 64%
15%
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