| Primary satellite | Secondary satellite |
| Name | Cosmos 1666 Rocket | CZ-2D DEB |
| Spacetrack catalog number | 15890 | 44609 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2024 Dec 22 16:44 | 2024 Dec 22 00:40 |
| Time of closest approach (UTC) | 2024 Dec 26 05:01:47.579 |
| Minimum distance | 3.479 km |
| Height difference | -2.271 km |
| Relative speed | 15.089 km/s |
| Angle between velocity vectors | 180° |
| Geographic position | 45.7°N, 43.7°E |
| Height | 623 km |
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