| Primary satellite | Secondary satellite |
| Name | COSMOS 2251 DEB | Star 20 E-31 |
| Spacetrack catalog number | 34953 | 14155 |
| Radar cross section | small | medium |
| Epoch of two-line elements (UTC) | 2024 Dec 22 09:54 | 2024 Dec 23 14:50 |
| Time of closest approach (UTC) | 2024 Dec 24 05:09:40.955 |
| Minimum distance | 3.458 km |
| Height difference | 3.357 km |
| Relative speed | 11.071 km/s |
| Angle between velocity vectors | 96° |
| Geographic position | 71.4°S, 53.6°E |
| Height | 750 km |
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