| Primary satellite | Secondary satellite |
| Name | Cosmos 1844 Rocket | FENGYUN 1C DEB |
| Spacetrack catalog number | 17974 | 36281 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 19 19:07 | 2021 Jan 19 18:34 |
| Time of closest approach (UTC) | 2020 Nov 29 14:36:43.287 |
| Minimum distance | 135.270 km |
| Height difference | -0.354 km |
| Relative speed | 14.200 km/s |
| Angle between velocity vectors | 143° |
| Geographic position | 69.4°N, 90.4°W |
| Height | 856 km |
|