| Primary satellite | Secondary satellite |
| Name | FengYun 1-2 T | COSMOS 2251 DEB |
| Spacetrack catalog number | 20855 | 37284 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 17 20:56 | 2021 Jan 17 20:36 |
| Time of closest approach (UTC) | 2020 Nov 27 20:19:21.138 |
| Minimum distance | 36.844 km |
| Height difference | -0.089 km |
| Relative speed | 14.391 km/s |
| Angle between velocity vectors | 153° |
| Geographic position | 70.4°S, 4.1°W |
| Height | 907 km |
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