| Primary satellite | Secondary satellite |
| Name | COSMOS 2251 DEB | YZ-1S DEB |
| Spacetrack catalog number | 35703 | 43644 |
| Radar cross section | small | large |
| Epoch of two-line elements (UTC) | 2024 Dec 20 19:48 | 2024 Dec 23 05:40 |
| Time of closest approach (UTC) | 2024 Dec 24 21:06:28.280 |
| Minimum distance | 3.039 km |
| Height difference | -1.780 km |
| Relative speed | 3.931 km/s |
| Angle between velocity vectors | 30° |
| Geographic position | 37.6°N, 12.7°W |
| Height | 670 km |
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