| Primary satellite | Secondary satellite |
| Name | Cosmos 1766 | JILIN-01-05 |
| Spacetrack catalog number | 16881 | 43023 |
| Radar cross section | large | medium |
| Epoch of two-line elements (UTC) | 2021 Jan 27 15:33 | 2021 Jan 27 21:36 |
| Time of closest approach (UTC) | 2020 Dec 03 05:04:26.287 |
| Minimum distance | 28.623 km |
| Height difference | -2.078 km |
| Relative speed | 14.816 km/s |
| Angle between velocity vectors | 156° |
| Geographic position | 82.2°S, 3.2°E |
| Height | 570 km |
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