| Primary satellite | Secondary satellite |
| Name | COSMOS 2251 DEB | FENGYUN 1C DEB |
| Spacetrack catalog number | 35031 | 31157 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2024 Dec 21 05:55 | 2024 Dec 20 16:51 |
| Time of closest approach (UTC) | 2024 Dec 26 22:35:37.791 |
| Minimum distance | 2.169 km |
| Height difference | -2.148 km |
| Relative speed | 14.851 km/s |
| Angle between velocity vectors | 166° |
| Geographic position | 55.2°S, 86.3°E |
| Height | 781 km |
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