| Primary satellite | Secondary satellite |
| Name | Cosmos 1666 | FLOCK 4X 12 |
| Spacetrack catalog number | 15889 | 51015 |
| Radar cross section | large | medium |
| Epoch of two-line elements (UTC) | 2022 Jul 03 11:54 | 2022 Jul 03 11:13 |
| Time of closest approach (UTC) | 2022 May 24 00:01:33.276 |
| Minimum distance | 225.930 km |
| Height difference | 2.793 km |
| Relative speed | 14.800 km/s |
| Angle between velocity vectors | 153° |
| Geographic position | 82.2°N, 164.6°W |
| Height | 527 km |
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