| Primary satellite | Secondary satellite |
| Name | Cosmos 2251 Rocket | FENGYUN 1C DEB |
| Spacetrack catalog number | 22676 | 32458 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 23 03:47 | 2021 Jan 20 10:17 |
| Time of closest approach (UTC) | 2020 Nov 29 02:03:14.526 |
| Minimum distance | 9.669 km |
| Height difference | 3.069 km |
| Relative speed | 14.876 km/s |
| Angle between velocity vectors | 172° |
| Geographic position | 25.3°S, 124.1°E |
| Height | 789 km |
|