| Primary satellite | Secondary satellite |
| Name | Cosmos 1733 | FLOCK 4P 6 |
| Spacetrack catalog number | 16611 | 44817 |
| Radar cross section | large | medium |
| Epoch of two-line elements (UTC) | 2021 Jan 20 11:47 | 2021 Jan 20 10:20 |
| Time of closest approach (UTC) | 2020 Dec 06 20:25:48.433 |
| Minimum distance | 0.693 km |
| Height difference | -0.685 km |
| Relative speed | 15.202 km/s |
| Angle between velocity vectors | 180° |
| Geographic position | 15.9°S, 163.0°W |
| Height | 519 km |
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