| Primary satellite | Secondary satellite |
| Name | Cosmos 1331 Rocket | FENGYUN 1C DEB |
| Spacetrack catalog number | 13028 | 29871 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Mar 06 08:53 | 2021 Mar 06 14:27 |
| Time of closest approach (UTC) | 2021 Jan 21 06:12:21.893 |
| Minimum distance | 16.751 km |
| Height difference | 1.943 km |
| Relative speed | 12.950 km/s |
| Angle between velocity vectors | 120° |
| Geographic position | 74.1°S, 178.5°E |
| Height | 778 km |
|