| Primary satellite | Secondary satellite |
| Name | DX 1 | COSMOS 2251 DEB |
| Spacetrack catalog number | 40071 | 37962 |
| Radar cross section | medium | small |
| Epoch of two-line elements (UTC) | 2021 Mar 06 04:21 | 2021 Mar 05 00:38 |
| Time of closest approach (UTC) | 2021 Jan 22 18:55:08.730 |
| Minimum distance | 690.478 km |
| Height difference | 1.955 km |
| Relative speed | 5.492 km/s |
| Angle between velocity vectors | 43° |
| Geographic position | 57.1°N, 6.5°E |
| Height | 629 km |
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