| Primary satellite | Secondary satellite |
| Name | Cosmos 1328 Rocket | COSMOS 2251 DEB |
| Spacetrack catalog number | 12988 | 35605 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2024 Dec 22 13:29 | 2024 Dec 20 17:09 |
| Time of closest approach (UTC) | 2024 Dec 27 14:09:39.446 |
| Minimum distance | 4.578 km |
| Height difference | -2.231 km |
| Relative speed | 4.601 km/s |
| Angle between velocity vectors | 36° |
| Geographic position | 71.3°S, 94.3°W |
| Height | 645 km |
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