| Primary satellite | Secondary satellite |
| Name | COSMOS 2251 DEB | FENGYUN 1C DEB |
| Spacetrack catalog number | 35459 | 29885 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2024 Dec 20 16:06 | 2024 Dec 22 20:53 |
| Time of closest approach (UTC) | 2024 Dec 29 02:40:54.551 |
| Minimum distance | 4.922 km |
| Height difference | 4.882 km |
| Relative speed | 14.692 km/s |
| Angle between velocity vectors | 157° |
| Geographic position | 66.5°N, 18.1°E |
| Height | 775 km |
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