| Primary satellite | Secondary satellite |
| Name | Meteor 1-21 | FENGYUN 1C DEB |
| Spacetrack catalog number | 7714 | 29789 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 25 20:33 | 2021 Jan 25 22:09 |
| Time of closest approach (UTC) | 2020 Dec 07 06:13:40.294 |
| Minimum distance | 7.469 km |
| Height difference | -2.510 km |
| Relative speed | 14.937 km/s |
| Angle between velocity vectors | 179° |
| Geographic position | 17.1°N, 131.3°W |
| Height | 872 km |
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