| Primary satellite | Secondary satellite |
| Name | COSMOS 2251 DEB | FENGYUN 1C DEB |
| Spacetrack catalog number | 33899 | 35169 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2024 Dec 23 12:32 | 2024 Dec 20 00:23 |
| Time of closest approach (UTC) | 2024 Dec 29 11:15:36.546 |
| Minimum distance | 1.555 km |
| Height difference | 0.891 km |
| Relative speed | 14.890 km/s |
| Angle between velocity vectors | 173° |
| Geographic position | 10.2°S, 118.6°E |
| Height | 749 km |
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