| Primary satellite | Secondary satellite |
| Name | COSMOS 2251 DEB | FENGYUN 1C DEB |
| Spacetrack catalog number | 35824 | 30390 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2024 Dec 20 06:36 | 2024 Dec 23 03:42 |
| Time of closest approach (UTC) | 2024 Dec 27 12:13:15.226 |
| Minimum distance | 3.492 km |
| Height difference | -3.199 km |
| Relative speed | 14.399 km/s |
| Angle between velocity vectors | 146° |
| Geographic position | 72.0°N, 127.7°E |
| Height | 778 km |
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