| Primary satellite | Secondary satellite |
| Name | DOVE 4 | COSMOS 2251 DEB |
| Spacetrack catalog number | 39430 | 33841 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2021 Mar 05 04:39 | 2021 Mar 04 22:45 |
| Time of closest approach (UTC) | 2021 Jan 22 18:51:03.236 |
| Minimum distance | 64.201 km |
| Height difference | -3.654 km |
| Relative speed | 3.062 km/s |
| Angle between velocity vectors | 24° |
| Geographic position | 0.4°N, 90.9°W |
| Height | 787 km |
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