| Primary satellite | Secondary satellite |
| Name | Cosmos 1898 Rocket | FENGYUN 1C DEB |
| Spacetrack catalog number | 18586 | 33689 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Apr 11 09:04 | 2021 Apr 09 09:31 |
| Time of closest approach (UTC) | 2021 Mar 02 05:25:20.204 |
| Minimum distance | 10.984 km |
| Height difference | -0.908 km |
| Relative speed | 11.662 km/s |
| Angle between velocity vectors | 102° |
| Geographic position | 72.9°N, 167.4°W |
| Height | 769 km |
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