| Primary satellite | Secondary satellite |
| Name | FENGYUN 1C DEB | deb Kosmos-249 |
| Spacetrack catalog number | 30218 | 3874 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2024 Dec 22 03:53 | 2024 Dec 22 19:13 |
| Time of closest approach (UTC) | 2024 Dec 25 07:54:21.646 |
| Minimum distance | 4.544 km |
| Height difference | -3.841 km |
| Relative speed | 14.385 km/s |
| Angle between velocity vectors | 147° |
| Geographic position | 50.6°N, 149.6°W |
| Height | 865 km |
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