| Primary satellite | Secondary satellite |
| Name | Cosmos 2251 Rocket | FENGYUN 1C DEB |
| Spacetrack catalog number | 22676 | 30093 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 17 12:10 | 2021 Jan 17 08:17 |
| Time of closest approach (UTC) | 2020 Nov 29 15:41:57.080 |
| Minimum distance | 84.646 km |
| Height difference | -0.929 km |
| Relative speed | 10.044 km/s |
| Angle between velocity vectors | 85° |
| Geographic position | 71.2°S, 33.4°W |
| Height | 816 km |
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