| Primary satellite | Secondary satellite |
| Name | Cosmos 1666 Rocket | FENGYUN 1C DEB |
| Spacetrack catalog number | 15890 | 31297 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2022 Jul 01 21:06 | 2022 Jul 01 01:11 |
| Time of closest approach (UTC) | 2022 May 30 19:13:47.392 |
| Minimum distance | 8.765 km |
| Height difference | -0.635 km |
| Relative speed | 15.142 km/s |
| Angle between velocity vectors | 178° |
| Geographic position | 44.6°N, 3.8°E |
| Height | 631 km |
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