| Primary satellite | Secondary satellite |
| Name | COSMOS 2251 DEB | deb Kosmos-1538 |
| Spacetrack catalog number | 33899 | 15785 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2024 Dec 23 12:32 | 2024 Dec 22 18:15 |
| Time of closest approach (UTC) | 2024 Dec 27 05:59:18.749 |
| Minimum distance | 1.864 km |
| Height difference | 1.492 km |
| Relative speed | 13.747 km/s |
| Angle between velocity vectors | 132° |
| Geographic position | 47.5°S, 45.1°E |
| Height | 687 km |
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