| Primary satellite | Secondary satellite |
| Name | Cosmos 1666 Rocket | CZ-6A DEB |
| Spacetrack catalog number | 15890 | 54475 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2024 Dec 22 16:44 | 2024 Dec 22 15:58 |
| Time of closest approach (UTC) | 2024 Dec 27 23:17:29.050 |
| Minimum distance | 4.429 km |
| Height difference | -3.909 km |
| Relative speed | 14.965 km/s |
| Angle between velocity vectors | 161° |
| Geographic position | 81.2°N, 118.2°W |
| Height | 617 km |
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