| Primary satellite | Secondary satellite |
| Name | SHIYUAN | COSMOS 2251 DEB |
| Spacetrack catalog number | 37931 | 34389 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2024 Dec 23 01:02 | 2024 Dec 22 16:01 |
| Time of closest approach (UTC) | 2024 Dec 26 05:45:04.874 |
| Minimum distance | 4.148 km |
| Height difference | 0.859 km |
| Relative speed | 14.852 km/s |
| Angle between velocity vectors | 170° |
| Geographic position | 42.6°S, 165.3°W |
| Height | 792 km |
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