| Primary satellite | Secondary satellite |
| Name | ALOS | FORMOSAT 3D |
| Spacetrack catalog number | 28931 | 29050 |
| Radar cross section | large | medium |
| Epoch of two-line elements (UTC) | 2021 Apr 11 20:46 | 2021 Apr 11 14:31 |
| Time of closest approach (UTC) | 2021 Mar 08 15:37:38.473 |
| Minimum distance | 13.025 km |
| Height difference | 0.705 km |
| Relative speed | 10.541 km/s |
| Angle between velocity vectors | 89° |
| Geographic position | 70.2°S, 28.4°E |
| Height | 710 km |
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