| Primary satellite | Secondary satellite |
| Name | Cosmos 1844 Rocket | FENGYUN 1C DEB |
| Spacetrack catalog number | 17974 | 31217 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 19 19:07 | 2021 Jan 19 20:01 |
| Time of closest approach (UTC) | 2020 Nov 25 15:45:29.209 |
| Minimum distance | 130.298 km |
| Height difference | 2.663 km |
| Relative speed | 13.910 km/s |
| Angle between velocity vectors | 139° |
| Geographic position | 69.9°N, 91.9°W |
| Height | 856 km |
|