| Primary satellite | Secondary satellite |
| Name | Cosmos 1844 Rocket | FENGYUN 1C DEB |
| Spacetrack catalog number | 17974 | 31370 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 17 10:55 | 2021 Jan 15 19:21 |
| Time of closest approach (UTC) | 2020 Nov 29 12:56:16.918 |
| Minimum distance | 35.635 km |
| Height difference | 2.579 km |
| Relative speed | 13.653 km/s |
| Angle between velocity vectors | 133° |
| Geographic position | 70.4°N, 57.2°W |
| Height | 857 km |
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