| Primary satellite | Secondary satellite |
| Name | Spot 4 Rocket | COSMOS 2251 DEB |
| Spacetrack catalog number | 25261 | 36420 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2024 Dec 22 23:46 | 2024 Dec 22 07:15 |
| Time of closest approach (UTC) | 2024 Dec 28 18:47:47.857 |
| Minimum distance | 4.701 km |
| Height difference | 3.573 km |
| Relative speed | 14.878 km/s |
| Angle between velocity vectors | 170° |
| Geographic position | 40.5°N, 17.0°W |
| Height | 780 km |
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