| Primary satellite | Secondary satellite |
| Name | Cosmos 1656 | FENGYUN 1C DEB |
| Spacetrack catalog number | 15755 | 30540 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2023 Sep 24 06:42 | 2023 Sep 23 17:33 |
| Time of closest approach (UTC) | 2023 Jun 06 04:51:12.896 |
| Minimum distance | 1487.307 km |
| Height difference | 19.757 km |
| Relative speed | 14.574 km/s |
| Angle between velocity vectors | 156° |
| Geographic position | 69.6°S, 8.9°E |
| Height | 825 km |
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