| Primary satellite | Secondary satellite |
| Name | Cosmos 1606 | FENGYUN 1C DEB |
| Spacetrack catalog number | 15369 | 36243 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2023 Sep 21 20:09 | 2023 Sep 20 18:06 |
| Time of closest approach (UTC) | 2023 Jun 01 21:13:10.656 |
| Minimum distance | 537.767 km |
| Height difference | 129.253 km |
| Relative speed | 15.127 km/s |
| Angle between velocity vectors | 179° |
| Geographic position | 25.3°N, 104.7°E |
| Height | 501 km |
|