| Primary satellite | Secondary satellite |
| Name | FENGYUN 1C DEB | Kosmos-985 |
| Spacetrack catalog number | 31834 | 10599 |
| Radar cross section | small | large |
| Epoch of two-line elements (UTC) | 2024 Dec 16 21:40 | 2024 Dec 22 17:40 |
| Time of closest approach (UTC) | 2024 Dec 29 23:58:40.286 |
| Minimum distance | 3.043 km |
| Height difference | 1.534 km |
| Relative speed | 14.675 km/s |
| Angle between velocity vectors | 178° |
| Geographic position | 22.8°S, 36.1°W |
| Height | 981 km |
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