| Primary satellite | Secondary satellite |
| Name | COSMOS 2251 DEB | FENGYUN 1C DEB |
| Spacetrack catalog number | 35959 | 29989 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2024 Dec 22 15:36 | 2024 Dec 22 22:29 |
| Time of closest approach (UTC) | 2024 Dec 28 17:42:38.237 |
| Minimum distance | 3.685 km |
| Height difference | 1.888 km |
| Relative speed | 12.786 km/s |
| Angle between velocity vectors | 117° |
| Geographic position | 74.0°N, 48.3°W |
| Height | 782 km |
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