| 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 26 11:47 | 2021 Jan 26 20:31 |
| Time of closest approach (UTC) | 2020 Dec 08 16:24:20.383 |
| Minimum distance | 11.798 km |
| Height difference | -0.618 km |
| Relative speed | 15.189 km/s |
| Angle between velocity vectors | 176° |
| Geographic position | 82.4°S, 174.9°E |
| Height | 532 km |
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