| Primary satellite | Secondary satellite |
| Name | Cosmos 1844 Rocket | FENGYUN 1C DEB |
| Spacetrack catalog number | 17974 | 30858 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 15 18:34 | 2021 Jan 15 20:34 |
| Time of closest approach (UTC) | 2020 Dec 08 06:11:29.101 |
| Minimum distance | 18.858 km |
| Height difference | -2.128 km |
| Relative speed | 11.495 km/s |
| Angle between velocity vectors | 101° |
| Geographic position | 70.3°S, 129.6°W |
| Height | 850 km |
|