| Primary satellite | Secondary satellite |
| Name | Cosmos 1666 Rocket | AAC-AIS-SAT2 |
| Spacetrack catalog number | 15890 | 56996 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2024 Dec 22 16:44 | 2024 Dec 22 21:24 |
| Time of closest approach (UTC) | 2024 Dec 25 05:00:34.024 |
| Minimum distance | 3.895 km |
| Height difference | -3.865 km |
| Relative speed | 10.501 km/s |
| Angle between velocity vectors | 88° |
| Geographic position | 78.8°N, 177.1°E |
| Height | 618 km |
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