| Primary satellite | Secondary satellite |
| Name | Cosmos 1844 Rocket | FENGYUN 1C DEB |
| Spacetrack catalog number | 17974 | 47040 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 17 10:55 | 2021 Jan 17 06:29 |
| Time of closest approach (UTC) | 2020 Dec 01 22:28:24.906 |
| Minimum distance | 38.142 km |
| Height difference | -2.208 km |
| Relative speed | 14.569 km/s |
| Angle between velocity vectors | 157° |
| Geographic position | 64.4°N, 124.4°E |
| Height | 855 km |
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