| Primary satellite | Secondary satellite |
| Name | SJ 16-02 | Explorer 31 |
| Spacetrack catalog number | 41634 | 1806 |
| Radar cross section | large | medium |
| Epoch of two-line elements (UTC) | 2021 Apr 16 05:26 | 2021 Apr 15 17:36 |
| Time of closest approach (UTC) | 2021 Mar 07 01:35:27.007 |
| Minimum distance | 17.090 km |
| Height difference | 5.572 km |
| Relative speed | 15.098 km/s |
| Angle between velocity vectors | 152° |
| Geographic position | 23.8°S, 60.5°W |
| Height | 626 km |
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