| Primary satellite | Secondary satellite |
| Name | Cosmos 1844 Rocket | FENGYUN 1C DEB |
| Spacetrack catalog number | 17974 | 31544 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 17 10:55 | 2021 Jan 17 08:34 |
| Time of closest approach (UTC) | 2020 Dec 02 18:53:48.810 |
| Minimum distance | 101.470 km |
| Height difference | 6.235 km |
| Relative speed | 12.368 km/s |
| Angle between velocity vectors | 113° |
| Geographic position | 70.9°N, 131.7°W |
| Height | 857 km |
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