| Primary satellite | Secondary satellite |
| Name | Cosmos 1842 | FENGYUN 1C DEB |
| Spacetrack catalog number | 17911 | 30025 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 17 15:39 | 2021 Jan 17 17:30 |
| Time of closest approach (UTC) | 2020 Dec 06 08:38:43.517 |
| Minimum distance | 277.736 km |
| Height difference | 3.948 km |
| Relative speed | 14.202 km/s |
| Angle between velocity vectors | 139° |
| Geographic position | 79.6°S, 141.6°E |
| Height | 555 km |
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