| Primary satellite | Secondary satellite |
| Name | Okean 1 Rocket | COSMOS 2251 DEB |
| Spacetrack catalog number | 19275 | 39587 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 17 13:06 | 2021 Jan 17 12:36 |
| Time of closest approach (UTC) | 2020 Dec 06 06:16:36.056 |
| Minimum distance | 31.640 km |
| Height difference | -5.677 km |
| Relative speed | 14.581 km/s |
| Angle between velocity vectors | 152° |
| Geographic position | 33.8°N, 130.5°W |
| Height | 638 km |
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