| Primary satellite | Secondary satellite |
| Name | Envisat | deb Ariane |
| Spacetrack catalog number | 27386 | 17121 |
| Radar cross section | large | medium |
| Epoch of two-line elements (UTC) | 2021 Apr 16 14:23 | 2021 Apr 16 14:17 |
| Time of closest approach (UTC) | 2021 Mar 09 07:49:16.724 |
| Minimum distance | 2.754 km |
| Height difference | 2.722 km |
| Relative speed | 5.904 km/s |
| Angle between velocity vectors | 47° |
| Geographic position | 81.0°N, 78.3°E |
| Height | 779 km |
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