| Primary satellite | Secondary satellite |
| Name | Envisat | deb Chang Zheng 4 |
| Spacetrack catalog number | 27386 | 20903 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 24 11:52 | 2021 Jan 23 13:27 |
| Time of closest approach (UTC) | 2020 Nov 27 06:50:48.470 |
| Minimum distance | 16.294 km |
| Height difference | -2.948 km |
| Relative speed | 4.407 km/s |
| Angle between velocity vectors | 34° |
| Geographic position | 81.3°S, 87.2°W |
| Height | 792 km |
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