| Primary satellite | Secondary satellite |
| Name | Meteor 1-21 | FENGYUN 1C DEB |
| Spacetrack catalog number | 7714 | 31323 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 17 04:29 | 2021 Jan 17 16:43 |
| Time of closest approach (UTC) | 2020 Dec 07 12:33:38.149 |
| Minimum distance | 11.716 km |
| Height difference | 5.332 km |
| Relative speed | 14.298 km/s |
| Angle between velocity vectors | 149° |
| Geographic position | 80.5°S, 63.7°E |
| Height | 873 km |
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