| Primary satellite | Secondary satellite |
| Name | deb Kosmos-397 | FENGYUN 1C DEB |
| Spacetrack catalog number | 21723 | 36238 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2024 Dec 22 22:16 | 2024 Dec 20 17:00 |
| Time of closest approach (UTC) | 2024 Dec 26 05:46:50.262 |
| Minimum distance | 3.126 km |
| Height difference | 0.190 km |
| Relative speed | 14.546 km/s |
| Angle between velocity vectors | 161° |
| Geographic position | 30.6°N, 153.9°E |
| Height | 870 km |
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