| Primary satellite | Secondary satellite |
| Name | Cosmos 2251 Rocket | FENGYUN 1C DEB |
| Spacetrack catalog number | 22676 | 32142 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 17 12:10 | 2021 Jan 15 12:51 |
| Time of closest approach (UTC) | 2020 Nov 30 20:55:06.641 |
| Minimum distance | 323.369 km |
| Height difference | -1.038 km |
| Relative speed | 5.925 km/s |
| Angle between velocity vectors | 47° |
| Geographic position | 58.3°N, 35.7°E |
| Height | 778 km |
|