| Primary satellite | Secondary satellite |
| Name | Cosmos 1733 | FLOCK 4P 9 |
| Spacetrack catalog number | 16611 | 44807 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 20 11:47 | 2021 Jan 19 20:49 |
| Time of closest approach (UTC) | 2020 Dec 07 00:45:28.495 |
| Minimum distance | 1.550 km |
| Height difference | -1.252 km |
| Relative speed | 15.201 km/s |
| Angle between velocity vectors | 180° |
| Geographic position | 67.5°S, 27.7°W |
| Height | 529 km |
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