| 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 06 21:44:09.321 |
| Minimum distance | 5.734 km |
| Height difference | 1.458 km |
| Relative speed | 15.194 km/s |
| Angle between velocity vectors | 180° |
| Geographic position | 76.7°S, 145.8°E |
| Height | 532 km |
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