| Primary satellite | Secondary satellite |
| Name | MetOp-A | WESTPAC |
| Spacetrack catalog number | 29499 | 25398 |
| Radar cross section | large | medium |
| Epoch of two-line elements (UTC) | 2021 Jan 16 12:15 | 2021 Jan 15 13:01 |
| Time of closest approach (UTC) | 2020 Dec 08 05:35:24.837 |
| Minimum distance | 13.412 km |
| Height difference | -3.115 km |
| Relative speed | 11.515 km/s |
| Angle between velocity vectors | 101° |
| Geographic position | 76.3°N, 80.2°E |
| Height | 833 km |
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