| Primary satellite | Secondary satellite |
| Name | Cosmos 1898 Rocket | FENGYUN 1C DEB |
| Spacetrack catalog number | 18586 | 30762 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Apr 11 09:04 | 2021 Apr 11 07:55 |
| Time of closest approach (UTC) | 2021 Mar 01 07:40:47.305 |
| Minimum distance | 11.428 km |
| Height difference | 6.843 km |
| Relative speed | 13.649 km/s |
| Angle between velocity vectors | 130° |
| Geographic position | 74.0°N, 145.9°E |
| Height | 768 km |
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