| Primary satellite | Secondary satellite |
| Name | FENGYUN 1C DEB | deb Kosmos-397 |
| Spacetrack catalog number | 31944 | 19367 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2024 Dec 18 02:56 | 2024 Dec 23 06:47 |
| Time of closest approach (UTC) | 2024 Dec 27 18:21:03.120 |
| Minimum distance | 3.834 km |
| Height difference | -3.153 km |
| Relative speed | 14.538 km/s |
| Angle between velocity vectors | 159° |
| Geographic position | 40.4°N, 48.0°W |
| Height | 926 km |
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