| Primary satellite | Secondary satellite |
| Name | STRAND 1 | deb Chang Zheng 4 |
| Spacetrack catalog number | 39090 | 20853 |
| Radar cross section | small | medium |
| Epoch of two-line elements (UTC) | 2021 Mar 01 09:54 | 2021 Mar 02 07:40 |
| Time of closest approach (UTC) | 2021 Jan 17 20:20:12.181 |
| Minimum distance | 7.641 km |
| Height difference | 0.663 km |
| Relative speed | 14.748 km/s |
| Angle between velocity vectors | 163° |
| Geographic position | 13.3°N, 17.0°W |
| Height | 782 km |
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