Asteroid (2023 FF5)
Closest pass on 2026-Oct-10 21:57 TDB (Julian Date: 2461324.414265235)
Key Facts
- On 2026-Oct-10 21:57, asteroid (2023 FF5) passed Earth at a nominal distance of 10,900,000 km (28.4 lunar distances).
- At closest approach, the object was traveling at 12.5 km/s relative to Earth.
- The object has an estimated size of 27.3 m, which is about 2.5 school buses.
- The miss distance was 0.2 times the Mars closest approach.
- Hazard classification: 25 to 50 meters. Can produce a low-altitude airburst or surface crater capable of flattening forests over hundreds of square kilometers and devastating a metropolitan area, comparable to the 1908 Tunguska event.
Visual Scale Comparison
| Target | 27 m |
|---|---|
| Smaller | blue whale: 25 m |
| Larger | Boeing 747: 70.6 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 | 2023 FF5 |
|---|---|
| Full Object Name | (2023 FF5) |
| Nominal Miss Distance | 10,900,000 km (28.4 lunar distances / 0.0730920283098107 au) |
| 3-Sigma Minimum Distance | 10,675,461.038 km (27.772 LD) |
| Relative Velocity (v_rel) | 12.4693174700182 km/s (about one and a half ISS orbital speeds) |
| Velocity at Infinity (v_inf) | 12.4663936503669 km/s |
| Time Uncertainty (3-sigma) | 1_05:53 |
| Absolute Magnitude (H) | 25.57 mag |
| Orbit Solution ID | 2 (NASA JPL Small-Body Database) |
| Inside Moon Orbit | No |
| Inside Geostationary Ring | No |
Cite this page
Permanent URL: https://whatnearlyhitus.com/approaches/2026-Oct-10/2023-ff5/ | Machine-readable twin: index.json
APA:
What Nearly Hit Us Project. (2026). Asteroid (2023 FF5) Close Approach on 2026-Oct-10 21:57. What Nearly Hit Us. Retrieved from https://whatnearlyhitus.com/approaches/2026-Oct-10/2023-ff5/MLA:
"Asteroid (2023 FF5) Close Approach on 2026-Oct-10 21:57." What Nearly Hit Us, What Nearly Hit Us Project, 2026-09-24, https://whatnearlyhitus.com/approaches/2026-Oct-10/2023-ff5/.BibTeX:
@misc{approach_2023FF5_202610,
title = {Asteroid (2023 FF5) Close Approach on 2026-Oct-10 21:57},
author = {{What Nearly Hit Us Project}},
year = {2026},
url = {https://whatnearlyhitus.com/approaches/2026-Oct-10/2023-ff5/},
note = {Primary upstream source: NASA/JPL CNEOS CAD API}
}