| Primary satellite | Secondary satellite |
| Name | Okean 2 Rocket | COSMOS 2251 DEB |
| Spacetrack catalog number | 20511 | 38487 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 15 13:04 | 2021 Jan 15 13:45 |
| Time of closest approach (UTC) | 2020 Dec 03 13:46:46.119 |
| Minimum distance | 33.293 km |
| Height difference | -1.524 km |
| Relative speed | 14.703 km/s |
| Angle between velocity vectors | 153° |
| Geographic position | 28.6°S, 120.2°E |
| Height | 636 km |
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