| Primary satellite | Secondary satellite |
| Name | COSMOS 2251 DEB | deb Kosmos-249 |
| Spacetrack catalog number | 35462 | 3908 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2024 Dec 21 21:54 | 2024 Dec 22 20:34 |
| Time of closest approach (UTC) | 2024 Dec 28 04:17:46.248 |
| Minimum distance | 0.779 km |
| Height difference | 0.488 km |
| Relative speed | 8.451 km/s |
| Angle between velocity vectors | 69° |
| Geographic position | 62.4°N, 167.4°E |
| Height | 879 km |
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