| Primary satellite | Secondary satellite |
| Name | Cosmos 1766 | 3CAT-5/B (TYVAK-0162) |
| Spacetrack catalog number | 16881 | 46293 |
| Radar cross section | large | medium |
| Epoch of two-line elements (UTC) | 2021 Jan 27 15:33 | 2021 Jan 27 19:51 |
| Time of closest approach (UTC) | 2020 Nov 30 21:37:11.479 |
| Minimum distance | 2.458 km |
| Height difference | -1.825 km |
| Relative speed | 15.160 km/s |
| Angle between velocity vectors | 180° |
| Geographic position | 49.9°S, 176.1°W |
| Height | 558 km |
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