| Primary satellite | Secondary satellite |
| Name | Cosmos 1733 | EPSILON R/B |
| Spacetrack catalog number | 16611 | 43153 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2021 Jan 20 03:53 | 2021 Jan 20 11:20 |
| Time of closest approach (UTC) | 2020 Dec 08 11:39:11.203 |
| Minimum distance | 86.075 km |
| Height difference | -2.673 km |
| Relative speed | 13.620 km/s |
| Angle between velocity vectors | 127° |
| Geographic position | 82.0°S, 142.7°W |
| Height | 532 km |
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