Asteroid (2025 UK9)
Closest pass on 2026-Oct-31 02:35 TDB (Julian Date: 2461344.607871972)
Key Facts
- On 2026-Oct-31 02:35, asteroid (2025 UK9) passed Earth at a nominal distance of 315,000 km (0.819 lunar distances).
- At closest approach, the object was traveling at 7.83 km/s relative to Earth.
- The object has an estimated size of 3.84 m, which is about the size of a family car.
- The miss distance was 0.819 times the distance to the Moon.
- Hazard classification: Under 10 meters. Typically burns up harmlessly high in the upper atmosphere, producing a bright meteor fireball with negligible ground risk and occasional small meteorite fragments.
Visual Scale Comparison
| Target | 4 m |
|---|---|
| Smaller | adult human: 1.7 m |
| Larger | family car: 4.5 m |
Object size compared to known reference benchmarks.
Miss Distance Orbital Dial
Concentric orbital rings showing Earth, Moon orbit, and asteroid trajectory.
Astrometric & Orbital Parameters
| Designation | 2025 UK9 |
|---|---|
| Full Object Name | (2025 UK9) |
| Nominal Miss Distance | 315,000 km (0.819 lunar distances / 0.0021032915876806 au) |
| 3-Sigma Minimum Distance | 86,255.434 km (0.224 LD) |
| Relative Velocity (v_rel) | 7.83419285217263 km/s (about the speed of a ISS orbital velocity) |
| Velocity at Infinity (v_inf) | 7.67078545793123 km/s |
| Time Uncertainty (3-sigma) | 01:00 |
| Absolute Magnitude (H) | 29.83 mag |
| Orbit Solution ID | 1 (NASA JPL Small-Body Database) |
| Inside Moon Orbit | Yes (less than 384,400 km) |
| Inside Geostationary Ring | No |
Cite this page
Permanent URL: https://whatnearlyhitus.com/approaches/2026-Oct-31/2025-uk9/ | Machine-readable twin: index.json
APA:
What Nearly Hit Us Project. (2026). Asteroid (2025 UK9) Close Approach on 2026-Oct-31 02:35. What Nearly Hit Us. Retrieved from https://whatnearlyhitus.com/approaches/2026-Oct-31/2025-uk9/MLA:
"Asteroid (2025 UK9) Close Approach on 2026-Oct-31 02:35." What Nearly Hit Us, What Nearly Hit Us Project, 2026-09-24, https://whatnearlyhitus.com/approaches/2026-Oct-31/2025-uk9/.BibTeX:
@misc{approach_2025UK9_202631,
title = {Asteroid (2025 UK9) Close Approach on 2026-Oct-31 02:35},
author = {{What Nearly Hit Us Project}},
year = {2026},
url = {https://whatnearlyhitus.com/approaches/2026-Oct-31/2025-uk9/},
note = {Primary upstream source: NASA/JPL CNEOS CAD API}
}