| Primary satellite | Secondary satellite |
| Name | Meteor 1-21 | FENGYUN 1C DEB |
| Spacetrack catalog number | 7714 | 33623 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 17 04:29 | 2020 Dec 24 11:06 |
| Time of closest approach (UTC) | 2020 Dec 07 21:52:27.751 |
| Minimum distance | 1.196 km |
| Height difference | -1.162 km |
| Relative speed | 14.795 km/s |
| Angle between velocity vectors | 177° |
| Geographic position | 76.7°N, 30.5°E |
| Height | 899 km |
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