What are the closest asteroid flybys ever recorded?

As of November 2026, the closest known asteroid flyby was 2025 UC11 (Oct 30, 2025), about 228 km above Earth's surface; the International Space Station orbits about 400 km up. The 15 flybys here were by small rocks, roughly 1 to 10 meters across, and nearly all are recent, because only modern surveys can spot rocks that small. JPL measures from Earth's center, so the chart subtracts Earth's average radius (6,371 km); asteroids that hit Earth aren't counted.

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Key facts

Measure: Kilometers above Earth's surface. Written from the data below.

  • 2011 CQ1 (Feb 4, 2011) has the highest figure, 5,481, followed by 2025 TQ2 (Oct 2, 2025) (4,868) and 2025 OS (Jul 19, 2025) (4,087).
  • 2025 UC11 (Oct 30, 2025) has the lowest figure, 228, followed by 2020 VT4 (Nov 13, 2020) (375) and 2025 TF (Oct 1, 2025) (409).

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Source and date

Source
NASA/JPL Center for Near Earth Object Studies (CNEOS), SBDB Close Approach Data
License
Public domain (NASA data); credit NASA/JPL-Caltech CNEOS
Data as of
Published

Citation

Chartly. “What are the closest asteroid flybys ever recorded?” Chart. Data: NASA/JPL Center for Near Earth Object Studies (CNEOS), SBDB Close Approach Data, https://cneos.jpl.nasa.gov/ca/ (data as of November 4, 2026). https://chart.ly/charts/closest-asteroid-flybys (accessed November 4, 2026).

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The data

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The file has the numbers in this table, with the source, license and date. Please credit the source and Chartly. Developers can also get them as JSON (how).

Asteroid and date of its flyby Kilometers above Earth's surface
2025 UC11 (Oct 30, 2025) 228
2020 VT4 (Nov 13, 2020) 375
2025 TF (Oct 1, 2025) 409
2026 TP128 (Oct 15, 2026) 1,119
2024 XA (Dec 1, 2024) 1,355
2024 LH1 (Jun 6, 2024) 1,727
2024 UG9 (Oct 30, 2024) 2,479
2020 QG (Aug 16, 2020) 2,946
2021 UA1 (Oct 25, 2021) 3,056
2025 BP6 (Jan 26, 2025) 3,341
2023 BU (Jan 27, 2023) 3,596
2023 RS (Sep 7, 2023) 3,990
2025 OS (Jul 19, 2025) 4,087
2025 TQ2 (Oct 2, 2025) 4,868
2011 CQ1 (Feb 4, 2011) 5,481

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