| Primary satellite | Secondary satellite |
| Name | Cosmos 1733 | NEMO-HD |
| Spacetrack catalog number | 16611 | 46277 |
| Radar cross section | large | medium |
| Epoch of two-line elements (UTC) | 2021 Jan 20 03:53 | 2021 Jan 20 11:17 |
| Time of closest approach (UTC) | 2020 Dec 05 22:44:44.390 |
| Minimum distance | 14.174 km |
| Height difference | -3.399 km |
| Relative speed | 15.144 km/s |
| Angle between velocity vectors | 170° |
| Geographic position | 82.5°N, 96.5°W |
| Height | 536 km |
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