| Primary satellite | Secondary satellite |
| Name | Okean-O | COSMOS 2251 DEB |
| Spacetrack catalog number | 25860 | 37325 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 15 01:24 | 2021 Jan 13 23:23 |
| Time of closest approach (UTC) | 2020 Nov 27 22:16:56.033 |
| Minimum distance | 91.507 km |
| Height difference | 1.474 km |
| Relative speed | 14.795 km/s |
| Angle between velocity vectors | 158° |
| Geographic position | 67.9°S, 112.6°E |
| Height | 665 km |
|