| Primary satellite | Secondary satellite |
| Name | Okean-O | COSMOS 2251 DEB |
| Spacetrack catalog number | 25860 | 34850 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 15 01:24 | 2021 Jan 15 04:13 |
| Time of closest approach (UTC) | 2020 Nov 29 03:08:14.541 |
| Minimum distance | 59.480 km |
| Height difference | -8.378 km |
| Relative speed | 15.059 km/s |
| Angle between velocity vectors | 171° |
| Geographic position | 22.9°N, 63.9°E |
| Height | 643 km |
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