| Primary satellite | Secondary satellite |
| Name | Envisat | IRIDIUM 33 DEB |
| Spacetrack catalog number | 27386 | 33775 |
| Radar cross section | large | medium |
| Epoch of two-line elements (UTC) | 2021 Jan 24 11:52 | 2021 Jan 24 10:28 |
| Time of closest approach (UTC) | 2020 Dec 01 23:34:20.142 |
| Minimum distance | 11.193 km |
| Height difference | 1.052 km |
| Relative speed | 13.683 km/s |
| Angle between velocity vectors | 133° |
| Geographic position | 81.5°N, 162.9°W |
| Height | 779 km |
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