| Primary satellite | Secondary satellite |
| Name | DOVE 4 | COSMOS 2251 DEB |
| Spacetrack catalog number | 39430 | 34735 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2021 Mar 05 04:39 | 2021 Mar 03 07:46 |
| Time of closest approach (UTC) | 2021 Jan 21 03:02:19.638 |
| Minimum distance | 581.848 km |
| Height difference | 8.003 km |
| Relative speed | 7.665 km/s |
| Angle between velocity vectors | 61° |
| Geographic position | 68.3°S, 166.5°E |
| Height | 685 km |
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