| Primary satellite | Secondary satellite |
| Name | Okean-O | FENGYUN 1C DEB |
| Spacetrack catalog number | 25860 | 31659 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Apr 16 07:54 | 2021 Apr 15 13:01 |
| Time of closest approach (UTC) | 2021 Mar 04 14:57:55.615 |
| Minimum distance | 257.712 km |
| Height difference | -3.911 km |
| Relative speed | 8.904 km/s |
| Angle between velocity vectors | 72° |
| Geographic position | 80.2°S, 169.7°W |
| Height | 667 km |
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