| Primary satellite | Secondary satellite |
| Name | COSMOS 2251 DEB | SHIYUAN 3 (SY-3) |
| Spacetrack catalog number | 34910 | 33433 |
| Radar cross section | small | medium |
| Epoch of two-line elements (UTC) | 2024 Dec 22 20:21 | 2024 Dec 23 09:02 |
| Time of closest approach (UTC) | 2024 Dec 29 23:10:58.039 |
| Minimum distance | 3.817 km |
| Height difference | -0.830 km |
| Relative speed | 11.248 km/s |
| Angle between velocity vectors | 97° |
| Geographic position | 72.5°N, 91.0°W |
| Height | 812 km |
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