| Primary satellite | Secondary satellite |
| Name | COSMOS 2251 DEB | FENGYUN 1C DEB |
| Spacetrack catalog number | 35959 | 35091 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2024 Dec 22 15:36 | 2024 Dec 22 05:36 |
| Time of closest approach (UTC) | 2024 Dec 28 22:43:00.597 |
| Minimum distance | 4.616 km |
| Height difference | -3.320 km |
| Relative speed | 13.987 km/s |
| Angle between velocity vectors | 139° |
| Geographic position | 73.3°N, 137.1°W |
| Height | 781 km |
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