NASA's Dart Mission Changed Orbit of Asteroid Didymos Around Sun

2 days ago

NASA's DART spacecraft impact on asteroid Dimorphos in 2022 altered the orbit of both Dimorphos and its companion Didymos around the Sun.
The orbital period of the binary system around the Sun changed by 0.15 seconds, marking the first human-made alteration of a celestial body's solar orbit.
The momentum enhancement factor from the impact was about two, doubling the effect due to debris ejected from Dimorphos.
The change in orbital speed was minimal (11.7 microns per second) but significant over time for planetary defense.
NASA's NEO Surveyor mission aims to detect hard-to-find near-Earth objects to enhance planetary defense strategies.
Researchers used stellar occultations and ground-based observations to precisely measure the asteroids' orbits and densities.
Dimorphos is a 'rubble pile' asteroid, likely formed from debris shed by Didymos.
DART was humanity's first mission to intentionally move a celestial object, managed by NASA's Planetary Defense Coordination Office.

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