| 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 03:53 | 2021 Jan 20 03:27 |
| Time of closest approach (UTC) | 2020 Dec 06 20:09:17.708 |
| Minimum distance | 2.895 km |
| Height difference | 1.522 km |
| Relative speed | 15.194 km/s |
| Angle between velocity vectors | 180° |
| Geographic position | 76.3°S, 170.7°E |
| Height | 532 km |
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