Asteroid (2026 SD1)
Closest pass on 2026-Sep-24 02:53 TDB (Julian Date: 2461307.620054954)
Key Facts
- On 2026-Sep-24 02:53, asteroid (2026 SD1) passed Earth at a nominal distance of 9,620,000 km (25 lunar distances).
- At closest approach, the object was traveling at 12.3 km/s relative to Earth.
- The object has an estimated size of 63 m, which is about 5 school buses.
- The miss distance was just over 25 times the distance to the Moon.
- Hazard classification: 50 to 140 meters. Reaches Earth surface to carve a crater over a kilometer wide (like Meteor Crater, Arizona), destroying infrastructure across an entire metropolitan region and generating damaging regional seismic waves.
Visual Scale Comparison
| Target | 63 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 | 2026 SD1 |
|---|---|
| Full Object Name | (2026 SD1) |
| Nominal Miss Distance | 9,620,000 km (25 lunar distances / 0.0642910407214333 au) |
| 3-Sigma Minimum Distance | 9,542,848.271 km (24.825 LD) |
| Relative Velocity (v_rel) | 12.2896439833023 km/s (about one and a half ISS orbital speeds) |
| Velocity at Infinity (v_inf) | 12.2862712484839 km/s |
| Time Uncertainty (3-sigma) | 00:02 |
| Absolute Magnitude (H) | 23.755 mag |
| Orbit Solution ID | 4 (NASA JPL Small-Body Database) |
| Inside Moon Orbit | No |
| Inside Geostationary Ring | No |
Cite this page
Permanent URL: https://whatnearlyhitus.com/approaches/2026-Sep-24/2026-sd1/ | Machine-readable twin: index.json
APA:
What Nearly Hit Us Project. (2026). Asteroid (2026 SD1) Close Approach on 2026-Sep-24 02:53. What Nearly Hit Us. Retrieved from https://whatnearlyhitus.com/approaches/2026-Sep-24/2026-sd1/MLA:
"Asteroid (2026 SD1) Close Approach on 2026-Sep-24 02:53." What Nearly Hit Us, What Nearly Hit Us Project, 2026-09-24, https://whatnearlyhitus.com/approaches/2026-Sep-24/2026-sd1/.BibTeX:
@misc{approach_2026SD1_202624,
title = {Asteroid (2026 SD1) Close Approach on 2026-Sep-24 02:53},
author = {{What Nearly Hit Us Project}},
year = {2026},
url = {https://whatnearlyhitus.com/approaches/2026-Sep-24/2026-sd1/},
note = {Primary upstream source: NASA/JPL CNEOS CAD API}
}