| Primary satellite | Secondary satellite |
| Name | Cosmos 2251 Rocket | FENGYUN 1C DEB |
| Spacetrack catalog number | 22676 | 33728 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 25 11:02 | 2021 Jan 25 18:22 |
| Time of closest approach (UTC) | 2020 Dec 03 11:00:03.586 |
| Minimum distance | 61.861 km |
| Height difference | 5.845 km |
| Relative speed | 13.325 km/s |
| Angle between velocity vectors | 127° |
| Geographic position | 74.1°N, 115.8°W |
| Height | 777 km |
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