| Primary satellite | Secondary satellite |
| Name | Cosmos 1538 Rocket | FENGYUN 1C DEB |
| Spacetrack catalog number | 14760 | 32411 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Apr 16 09:20 | 2021 Apr 16 07:40 |
| Time of closest approach (UTC) | 2021 Mar 06 14:50:14.010 |
| Minimum distance | 142.312 km |
| Height difference | 3.459 km |
| Relative speed | 7.686 km/s |
| Angle between velocity vectors | 62° |
| Geographic position | 65.1°S, 84.8°E |
| Height | 802 km |
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