DART impact nudged asteroid orbit around sun

WASHINGTON — New measurements show NASA’s 2022 Double Asteroid Redirection Test (DART) impact not only shortened Dimorphos’s orbit around Didymos but also nudged the pair’s path around the Sun, a first measurable human-caused change in a natural object’s solar orbit. This report highlights details independently confirmed by at least four outlets, including Science News, Ars Technica, National Geographic, ScienceDaily, WRAL, and Space Coast Daily.

• DART intentionally crashed into the moonlet Dimorphos on Sept. 26, 2022 as a planetary-defense test in the binary system with Didymos.
• The collision shortened Dimorphos’s roughly 12-hour orbit around Didymos by about 33 minutes.
• A new Science Advances study finds the binary system’s orbit around the Sun shifted by about 0.15 seconds, marking the first measured human-caused change to a natural object’s heliocentric orbit.
• Researchers measured the tiny shift using stellar occultations and years of ground-based observations, including 22 occultations recorded from October 2022 to March 2025.
• Didymos and Dimorphos are not a threat to Earth, but the results validate kinetic-impact deflection as a viable planetary-defense technique.

Additional Details Reported

What powered the extra push

Several reports note that ejecta blasted off Dimorphos after impact added extra thrust to the system, amplifying the effect beyond the spacecraft’s direct momentum. Some analyses describe the momentum enhancement factor as roughly doubling the impact’s push.

What comes next

The European Space Agency’s Hera mission is expected to arrive later this decade to study the impact crater, debris field, and the binary’s structure in detail.

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