| Primary satellite | Secondary satellite |
| Name | Cosmos 1766 | JILIN-1-03 |
| Spacetrack catalog number | 16881 | 41914 |
| Radar cross section | large | medium |
| Epoch of two-line elements (UTC) | 2021 Jan 26 10:57 | 2021 Jan 26 07:41 |
| Time of closest approach (UTC) | 2020 Dec 03 05:03:32.409 |
| Minimum distance | 19.251 km |
| Height difference | -0.146 km |
| Relative speed | 15.045 km/s |
| Angle between velocity vectors | 167° |
| Geographic position | 82.5°S, 9.9°W |
| Height | 571 km |
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