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Near-Earth Asteroids as of September 2025 The graphic presents data on near-Earth asteroids as of September 8, 2025. Key statistics include: 39,123: Total number of discovered near-Earth asteroids of all sizes. 873: Discovered asteroids larger than 1 kilometer, with an estimated 50 left to be found. 11,343: Discovered asteroids larger than 140 meters, with an estimated 14,000 remaining to be found. NASA-DLR BECCAL Photo Op at the Space Symposium. 100 Tons amount of dust and sand-sized particles that bombard Earth daily. Near-Earth asteroid close approaches: 12 passed closer to Earth than the Moon in the last 30 days. 176 passed closer in the last 365 days. 500,000,000: Observations of near-Earth objects submitted to the Minor Planet Center. The background shows a space-themed image with the NASA logo at the top right. Each month, NASA’s Planetary Defense Coordination Office releases a monthly update featuring the most recent figures on NASA’s planetary defense efforts, near-Earth object close approaches, and other timely facts about comets and asteroids that could pose an impact hazard with Earth. Here is what we’ve found so far.

Updated: September 11, 2025

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Details Last Updated Sep 11, 2025 Related Terms Planetary Defense General Planetary Defense Coordination Office Planetary Science Planetary Science Division Science & Research Science Mission Directorate

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Near-Earth Asteroids as of September 2025