| Primary satellite | Secondary satellite |
| Name | COSMOS 2251 DEB | FENGYUN 1C DEB |
| Spacetrack catalog number | 39554 | 31355 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2024 Dec 21 04:38 | 2024 Dec 22 18:54 |
| Time of closest approach (UTC) | 2024 Dec 24 06:28:37.592 |
| Minimum distance | 2.120 km |
| Height difference | 0.589 km |
| Relative speed | 15.048 km/s |
| Angle between velocity vectors | 172° |
| Geographic position | 18.4°N, 74.2°E |
| Height | 623 km |
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