| Primary satellite | Secondary satellite |
| Name | Tiros 1 | FENGYUN 1C DEB |
| Spacetrack catalog number | 29 | 31557 |
| Radar cross section | medium | small |
| Epoch of two-line elements (UTC) | 2021 Apr 13 00:15 | 2021 Apr 06 07:22 |
| Time of closest approach (UTC) | 2021 Mar 05 08:04:40.862 |
| Minimum distance | 9.466 km |
| Height difference | -3.406 km |
| Relative speed | 9.215 km/s |
| Angle between velocity vectors | 75° |
| Geographic position | 42.4°N, 0.9°W |
| Height | 665 km |
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