| Primary satellite | Secondary satellite |
| Name | DOVE 4 | COSMOS 2251 DEB |
| Spacetrack catalog number | 39430 | 34922 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2021 Mar 05 04:39 | 2021 Mar 04 10:43 |
| Time of closest approach (UTC) | 2021 Jan 23 04:13:13.129 |
| Minimum distance | 88.077 km |
| Height difference | 2.968 km |
| Relative speed | 14.572 km/s |
| Angle between velocity vectors | 149° |
| Geographic position | 69.3°S, 72.6°W |
| Height | 636 km |
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