| Primary satellite | Secondary satellite |
| Name | Cosmos 1140 Rocket | FENGYUN 1C DEB |
| Spacetrack catalog number | 11574 | 31029 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2023 Sep 22 04:25 | 2023 Sep 21 20:37 |
| Time of closest approach (UTC) | 2023 Jun 11 10:22:14.781 |
| Minimum distance | 495.053 km |
| Height difference | 1.328 km |
| Relative speed | 13.150 km/s |
| Angle between velocity vectors | 123° |
| Geographic position | 73.7°S, 14.0°W |
| Height | 775 km |
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