| Primary satellite | Secondary satellite |
| Name | COSMOS 2251 DEB | FENGYUN 1C DEB |
| Spacetrack catalog number | 35703 | 31505 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2024 Dec 20 19:48 | 2024 Dec 22 11:27 |
| Time of closest approach (UTC) | 2024 Dec 29 20:58:23.796 |
| Minimum distance | 4.591 km |
| Height difference | -2.385 km |
| Relative speed | 15.017 km/s |
| Angle between velocity vectors | 172° |
| Geographic position | 55.2°N, 14.0°W |
| Height | 655 km |
|