Kinetic impacts can steer hazardous asteroids through gravitational ‘keyholes,’ new research warns

New research presented at EPSC–DPS 2025 shows kinetic-impact deflection of hazardous asteroids can inadvertently push a target through narrow gravitational "keyholes," altering its orbit and potentially returning it to impact Earth. The study says careful impact-site selection and higher-fidelity orbital modelling are essential for safe planetary defence.

Discovered 2025-09-09T07:01:46.551530-07:00 | 2025-09-09T07:01:46.551530-07:00

Briefing

What Hype is tracking

  • Planetary-defence mission design must account for narrow gravitational "keyholes": mis‑placed kinetic impacts can change post‑deflection trajectories and raise return‑to‑Earth risk, a vulnerability highlighted at EPSC–DPS2025. See the DART follow‑on analysis showing complex ejecta effects on trajectory after impact (DART’s ejected boulders carried triple momentum)
  • The finding increases requirements for precise targeting, improved orbital modelling and cross‑agency coordination on mitigation strategies; it dovetails with broader industry efforts to harden and mitigate space hazards (ESA has launched an industry consultation to shape spacecraft designs)

Reported By

scitechdaily.com Space Daily New Scientist knowridge.com Space.com Universe Today
Sources Tracked
8
First Seen
2025-09-09T07:01:46.551530-07:00
Latest Update
2025-09-15T01:27:20.853191-07:00
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Space

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