| Primary satellite | Secondary satellite |
| Name | FENGYUN 1C DEB | deb Kosmos-397 |
| Spacetrack catalog number | 30654 | 5280 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2024 Dec 23 04:50 | 2024 Dec 22 15:46 |
| Time of closest approach (UTC) | 2024 Dec 29 08:15:34.082 |
| Minimum distance | 2.603 km |
| Height difference | -2.533 km |
| Relative speed | 14.670 km/s |
| Angle between velocity vectors | 156° |
| Geographic position | 48.3°S, 57.0°E |
| Height | 844 km |
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