| Primary satellite | Secondary satellite |
| Name | Cosmos 1733 | FLOCK 4P 3 |
| Spacetrack catalog number | 16611 | 44812 |
| Radar cross section | large | medium |
| Epoch of two-line elements (UTC) | 2021 Jan 20 11:47 | 2021 Jan 20 06:36 |
| Time of closest approach (UTC) | 2020 Dec 08 14:50:25.090 |
| Minimum distance | 18.773 km |
| Height difference | -0.608 km |
| Relative speed | 15.189 km/s |
| Angle between velocity vectors | 177° |
| Geographic position | 82.2°S, 154.1°W |
| Height | 532 km |
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