| Primary satellite | Secondary satellite |
| Name | Cosmos 1538 Rocket | FENGYUN 1C DEB |
| Spacetrack catalog number | 14760 | 31834 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Apr 16 09:20 | 2021 Apr 16 16:36 |
| Time of closest approach (UTC) | 2021 Mar 04 20:56:50.417 |
| Minimum distance | 122.906 km |
| Height difference | -0.932 km |
| Relative speed | 12.643 km/s |
| Angle between velocity vectors | 116° |
| Geographic position | 74.1°S, 51.1°W |
| Height | 811 km |
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