International Asteroid Warning Network
IAWN is a world-wide planetary defense collaboration of organizations and individual astronomers recommended by United Nations resolution who collectively work to detect, monitor, and characterize potentially hazardous asteroids and Near-Earth Objects (NEOs). If an asteroid threat were ever identified, IAWN would act as a centralized hub for disseminating information to governments to aid with analysis of impact consequences and with planning of mitigation response options.
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IAWN Notifications
- 2025.02.24: Final Notification: 2024 YR4 -- No Significant Potential for Future Impact with Earth
- 2025.01.29: Notification of Potential Impactor: Asteroid 2024 YR4
Current Activities
March 5, 2026: The probability of asteroid 2024 YR4 impacting the Moon on Dec. 22, 2032 has dropped to zero as determined by NASA and ESA using astrometry from JWST acquired in February 2026.
- NASA announcement: New NASA Asteroid Observations Eliminate Chance of 2032 Lunar Impact
- ESA announcement: Asteroid 2024 YR4 will not impact the Moon
Recent Signatories
- Armagh Observatory
- Indian Space Research Organisation (ISRO)
- Gruppo Astrofili Rozzano, Civico Osservatorio Astronomico di Rozzano (MPC-D66)
- Enrico Prosperi, Castelmartini Observatory (MPC-160)