| Primary satellite | Secondary satellite |
| Name | ARIANE 6 FM1 Upper Stage | COSMOS 2251 DEB |
| Spacetrack catalog number | 60235 | 34949 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2026 Jan 22 12:36 | 2026 Jan 22 06:51 |
| Time of closest approach (UTC) | 2025 Dec 17 21:59:13.939 |
| Minimum distance | 156.943 km |
| Height difference | 2.601 km |
| Relative speed | 5.195 km/s |
| Angle between velocity vectors | 40° |
| Geographic position | 61.2°S, 10.6°E |
| Height | 633 km |
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