| Primary satellite | Secondary satellite |
| Name | Cosmos 1125 Rocket | FENGYUN 1C DEB |
| Spacetrack catalog number | 11511 | 36702 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 20 12:05 | 2020 Dec 21 08:37 |
| Time of closest approach (UTC) | 2020 Dec 04 09:17:59.142 |
| Minimum distance | 24.699 km |
| Height difference | 0.903 km |
| Relative speed | 12.936 km/s |
| Angle between velocity vectors | 119° |
| Geographic position | 74.1°N, 26.7°E |
| Height | 770 km |
|