| Primary satellite | Secondary satellite |
| Name | SHIYUAN | COSMOS 2251 DEB |
| Spacetrack catalog number | 37931 | 34814 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2024 Dec 23 01:02 | 2024 Dec 22 18:18 |
| Time of closest approach (UTC) | 2024 Dec 25 08:29:14.157 |
| Minimum distance | 4.600 km |
| Height difference | 1.626 km |
| Relative speed | 12.265 km/s |
| Angle between velocity vectors | 111° |
| Geographic position | 73.6°N, 114.3°E |
| Height | 815 km |
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