| Primary satellite | Secondary satellite |
| Name | Cosmos 1842 Rocket | FENGYUN 1C DEB |
| Spacetrack catalog number | 17912 | 31636 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Apr 10 11:11 | 2021 Apr 10 04:29 |
| Time of closest approach (UTC) | 2021 Mar 02 12:53:49.473 |
| Minimum distance | 3.885 km |
| Height difference | 0.362 km |
| Relative speed | 15.044 km/s |
| Angle between velocity vectors | 179° |
| Geographic position | 5.5°N, 133.8°W |
| Height | 622 km |
|