| Primary satellite | Secondary satellite |
| Name | FENGYUN 1C DEB | deb Kosmos-397 |
| Spacetrack catalog number | 38147 | 5527 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2024 Dec 20 18:36 | 2024 Dec 22 23:18 |
| Time of closest approach (UTC) | 2024 Dec 26 00:24:40.581 |
| Minimum distance | 4.344 km |
| Height difference | -4.320 km |
| Relative speed | 14.822 km/s |
| Angle between velocity vectors | 165° |
| Geographic position | 0.7°N, 97.7°E |
| Height | 804 km |
|