| Primary satellite | Secondary satellite |
| Name | Cosmos 1733 | FLOCK EP 9 |
| Spacetrack catalog number | 16611 | 46815 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 26 11:47 | 2021 Jan 26 16:45 |
| Time of closest approach (UTC) | 2020 Dec 06 19:25:07.974 |
| Minimum distance | 4.858 km |
| Height difference | 3.174 km |
| Relative speed | 15.196 km/s |
| Angle between velocity vectors | 180° |
| Geographic position | 62.2°N, 20.0°E |
| Height | 532 km |
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