| Primary satellite | Secondary satellite |
| Name | Cosmos 1766 | FLOCK 1C 3 |
| Spacetrack catalog number | 16881 | 40041 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2025 Jul 10 17:00 | 2024 Dec 26 06:34 |
| Time of closest approach (UTC) | 2024 Jun 14 19:09:53.007 |
| Minimum distance | 7458.200 km |
| Height difference | -78.477 km |
| Relative speed | 15.222 km/s |
| Angle between velocity vectors | 165° |
| Geographic position | 8.1°N, 152.8°W |
| Height | 460 km |
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