| Primary satellite | Secondary satellite |
| Name | DX 1 | COSMOS 2251 DEB |
| Spacetrack catalog number | 40071 | 36070 |
| Radar cross section | medium | small |
| Epoch of two-line elements (UTC) | 2021 Mar 02 12:49 | 2021 Mar 02 07:11 |
| Time of closest approach (UTC) | 2021 Jan 19 21:07:38.197 |
| Minimum distance | 170.323 km |
| Height difference | -8.985 km |
| Relative speed | 14.013 km/s |
| Angle between velocity vectors | 136° |
| Geographic position | 75.1°N, 6.3°W |
| Height | 635 km |
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