| Primary satellite | Secondary satellite |
| Name | Cosmos 1733 | FLOCK 4P 2 |
| Spacetrack catalog number | 16611 | 44813 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 20 11:47 | 2021 Jan 20 14:55 |
| Time of closest approach (UTC) | 2020 Dec 06 21:57:19.435 |
| Minimum distance | 1.285 km |
| Height difference | 0.651 km |
| Relative speed | 15.200 km/s |
| Angle between velocity vectors | 180° |
| Geographic position | 28.9°S, 172.0°E |
| Height | 521 km |
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