| Primary satellite | Secondary satellite |
| Name | Cosmos 1733 | ZY 3 |
| Spacetrack catalog number | 16611 | 38046 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2021 Jan 20 03:53 | 2021 Jan 20 10:48 |
| Time of closest approach (UTC) | 2020 Dec 06 18:30:09.992 |
| Minimum distance | 107.750 km |
| Height difference | -4.551 km |
| Relative speed | 15.126 km/s |
| Angle between velocity vectors | 169° |
| Geographic position | 81.4°S, 108.2°E |
| Height | 532 km |
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