| Primary satellite | Secondary satellite |
| Name | FENGYUN 1C DEB | deb Kosmos-839 |
| Spacetrack catalog number | 30829 | 10454 |
| Radar cross section | small | medium |
| Epoch of two-line elements (UTC) | 2024 Dec 22 10:45 | 2024 Dec 22 21:02 |
| Time of closest approach (UTC) | 2024 Dec 24 23:02:55.405 |
| Minimum distance | 3.664 km |
| Height difference | -3.625 km |
| Relative speed | 14.591 km/s |
| Angle between velocity vectors | 151° |
| Geographic position | 54.0°N, 109.0°E |
| Height | 889 km |
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