| Primary satellite | Secondary satellite |
| Name | Cosmos 1733 | FLOCK 4P 8 |
| Spacetrack catalog number | 16611 | 44815 |
| Radar cross section | large | medium |
| Epoch of two-line elements (UTC) | 2021 Jan 20 11:47 | 2021 Jan 20 04:52 |
| Time of closest approach (UTC) | 2020 Dec 04 17:28:13.428 |
| Minimum distance | 5.762 km |
| Height difference | 2.287 km |
| Relative speed | 15.184 km/s |
| Angle between velocity vectors | 176° |
| Geographic position | 82.5°S, 164.4°E |
| Height | 532 km |
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