| Primary satellite | Secondary satellite |
| Name | ONEWEB-0421 | FENGYUN 1C DEB |
| Spacetrack catalog number | 50496 | 29832 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2023 Jan 27 22:00 | 2023 Jan 27 15:08 |
| Time of closest approach (UTC) | 2022 Dec 10 07:10:23.902 |
| Minimum distance | 3907.997 km |
| Height difference | -563.710 km |
| Relative speed | 14.755 km/s |
| Angle between velocity vectors | 165° |
| Geographic position | 13.7°S, 135.4°W |
| Height | 1171 km |
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