| Primary satellite | Secondary satellite |
| Name | MetOp-A | COSMOS 2251 DEB |
| Spacetrack catalog number | 29499 | 36061 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 25 22:01 | 2021 Jan 25 15:43 |
| Time of closest approach (UTC) | 2020 Dec 01 21:34:28.640 |
| Minimum distance | 1.316 km |
| Height difference | -0.091 km |
| Relative speed | 10.799 km/s |
| Angle between velocity vectors | 93° |
| Geographic position | 72.3°N, 169.3°W |
| Height | 833 km |
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