| Primary satellite | Secondary satellite |
| Name | FENGYUN 1C DEB | deb Kosmos-249 |
| Spacetrack catalog number | 38725 | 3874 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2024 Dec 21 06:26 | 2024 Dec 22 19:13 |
| Time of closest approach (UTC) | 2024 Dec 28 04:47:33.978 |
| Minimum distance | 1.416 km |
| Height difference | 0.062 km |
| Relative speed | 14.837 km/s |
| Angle between velocity vectors | 156° |
| Geographic position | 34.9°N, 127.9°E |
| Height | 768 km |
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