| Primary satellite | Secondary satellite |
| Name | COSMOS 2251 DEB | FENGYUN 1C DEB |
| Spacetrack catalog number | 35789 | 30921 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2024 Dec 22 14:34 | 2024 Dec 22 19:17 |
| Time of closest approach (UTC) | 2024 Dec 29 06:42:51.806 |
| Minimum distance | 1.952 km |
| Height difference | 0.156 km |
| Relative speed | 13.207 km/s |
| Angle between velocity vectors | 125° |
| Geographic position | 74.1°S, 86.3°W |
| Height | 816 km |
|