| Primary satellite | Secondary satellite |
| Name | Cosmos 1666 Rocket | FENGYUN 1C DEB |
| Spacetrack catalog number | 15890 | 29872 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2022 Jul 01 13:01 | 2022 Jul 01 19:14 |
| Time of closest approach (UTC) | 2022 May 31 20:29:41.931 |
| Minimum distance | 3.701 km |
| Height difference | 0.480 km |
| Relative speed | 15.211 km/s |
| Angle between velocity vectors | 179° |
| Geographic position | 6.3°S, 169.4°E |
| Height | 609 km |
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