| Primary satellite | Secondary satellite |
| Name | Cosmos 1666 Rocket | YAOGAN 29 DEB |
| Spacetrack catalog number | 15890 | 42673 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2024 Dec 22 16:44 | 2024 Dec 22 20:32 |
| Time of closest approach (UTC) | 2024 Dec 27 05:37:11.896 |
| Minimum distance | 1.611 km |
| Height difference | -1.267 km |
| Relative speed | 15.128 km/s |
| Angle between velocity vectors | 179° |
| Geographic position | 58.6°N, 167.1°W |
| Height | 610 km |
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