| Primary satellite | Secondary satellite |
| Name | Cosmos 1666 Rocket | YAOGAN 29 |
| Spacetrack catalog number | 15890 | 41038 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2024 Dec 22 16:44 | 2024 Dec 23 03:53 |
| Time of closest approach (UTC) | 2024 Dec 25 23:32:56.183 |
| Minimum distance | 4.491 km |
| Height difference | 2.858 km |
| Relative speed | 14.999 km/s |
| Angle between velocity vectors | 170° |
| Geographic position | 81.7°S, 2.2°E |
| Height | 648 km |
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