| Primary satellite | Secondary satellite |
| Name | Cosmos 1733 | OBJECT K |
| Spacetrack catalog number | 16611 | 43858 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 26 11:47 | 2021 Jan 26 11:27 |
| Time of closest approach (UTC) | 2020 Dec 09 20:44:38.753 |
| Minimum distance | 93.564 km |
| Height difference | 5.260 km |
| Relative speed | 14.854 km/s |
| Angle between velocity vectors | 156° |
| Geographic position | 57.3°S, 20.3°E |
| Height | 526 km |
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