| Primary satellite | Secondary satellite |
| Name | Okean-O | STARS |
| Spacetrack catalog number | 25860 | 33498 |
| Radar cross section | large | medium |
| Epoch of two-line elements (UTC) | 2021 Jan 15 01:24 | 2021 Jan 15 04:38 |
| Time of closest approach (UTC) | 2020 Nov 29 22:29:10.395 |
| Minimum distance | 3.121 km |
| Height difference | -0.563 km |
| Relative speed | 14.486 km/s |
| Angle between velocity vectors | 148° |
| Geographic position | 59.0°N, 144.0°E |
| Height | 650 km |
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