| 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) | 2025 Jul 16 18:32 | 2025 Jul 15 07:21 |
| Time of closest approach (UTC) | 2024 Jun 25 12:35:16.089 |
| Minimum distance | 290.699 km |
| Height difference | -16.711 km |
| Relative speed | 15.099 km/s |
| Angle between velocity vectors | 178° |
| Geographic position | 22.9°N, 93.1°E |
| Height | 623 km |
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