| Primary satellite | Secondary satellite |
| Name | SEDSat Delta rocket | COSMOS 2251 DEB |
| Spacetrack catalog number | 25510 | 36453 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Mar 02 08:22 | 2021 Mar 02 01:45 |
| Time of closest approach (UTC) | 2021 Jan 19 09:24:10.122 |
| Minimum distance | 34.519 km |
| Height difference | -6.442 km |
| Relative speed | 8.859 km/s |
| Angle between velocity vectors | 73° |
| Geographic position | 31.5°N, 6.1°E |
| Height | 830 km |
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