| Primary satellite | Secondary satellite |
| Name | COSMOS 2251 DEB | FENGYUN 1C DEB |
| Spacetrack catalog number | 34910 | 30387 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2024 Dec 22 20:21 | 2024 Dec 22 13:32 |
| Time of closest approach (UTC) | 2024 Dec 23 18:07:06.230 |
| Minimum distance | 3.926 km |
| Height difference | -3.922 km |
| Relative speed | 9.772 km/s |
| Angle between velocity vectors | 81° |
| Geographic position | 70.3°N, 11.6°W |
| Height | 859 km |
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