| Primary satellite | Secondary satellite |
| Name | Cosmos 1666 | LEMUR 2 SAM-AMELIA |
| Spacetrack catalog number | 15889 | 42781 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2022 Jul 06 10:55 | 2022 Jul 06 13:29 |
| Time of closest approach (UTC) | 2022 May 20 14:46:25.926 |
| Minimum distance | 50.605 km |
| Height difference | -1.539 km |
| Relative speed | 15.209 km/s |
| Angle between velocity vectors | 178° |
| Geographic position | 72.0°S, 115.6°W |
| Height | 516 km |
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