| Primary satellite | Secondary satellite |
| Name | COSMOS 2251 DEB | Cosmos 1354 |
| Spacetrack catalog number | 39586 | 13148 |
| Radar cross section | small | large |
| Epoch of two-line elements (UTC) | 2024 Dec 21 02:55 | 2024 Dec 22 12:23 |
| Time of closest approach (UTC) | 2024 Dec 24 23:36:25.954 |
| Minimum distance | 1.443 km |
| Height difference | 1.425 km |
| Relative speed | 13.062 km/s |
| Angle between velocity vectors | 122° |
| Geographic position | 55.6°N, 77.5°E |
| Height | 798 km |
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