| Primary satellite | Secondary satellite |
| Name | Ariane Rocket | COSMOS 2251 DEB |
| Spacetrack catalog number | 23561 | 40795 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 17 18:36 | 2021 Jan 16 04:10 |
| Time of closest approach (UTC) | 2020 Dec 04 16:38:54.326 |
| Minimum distance | 24.224 km |
| Height difference | 0.151 km |
| Relative speed | 13.963 km/s |
| Angle between velocity vectors | 140° |
| Geographic position | 72.9°S, 87.3°E |
| Height | 796 km |
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