| Primary satellite | Secondary satellite |
| Name | FENGYUN 1C DEB | deb Kosmos-839 |
| Spacetrack catalog number | 31979 | 18471 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2024 Dec 23 12:39 | 2024 Dec 23 09:35 |
| Time of closest approach (UTC) | 2024 Dec 28 05:26:41.560 |
| Minimum distance | 15.657 km |
| Height difference | -4.070 km |
| Relative speed | 11.312 km/s |
| Angle between velocity vectors | 96° |
| Geographic position | 64.7°N, 99.6°W |
| Height | 871 km |
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