| Primary satellite | Secondary satellite |
| Name | Cosmos 1125 Rocket | FENGYUN 1C DEB |
| Spacetrack catalog number | 11511 | 30872 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 16 12:51 | 2021 Jan 16 17:13 |
| Time of closest approach (UTC) | 2020 Dec 02 16:20:01.413 |
| Minimum distance | 24.302 km |
| Height difference | -5.673 km |
| Relative speed | 11.892 km/s |
| Angle between velocity vectors | 106° |
| Geographic position | 73.4°S, 86.1°E |
| Height | 807 km |
|