| Primary satellite | Secondary satellite |
| Name | ALOS | PATHFINDER 1 |
| Spacetrack catalog number | 28931 | 41787 |
| Radar cross section | large | medium |
| Epoch of two-line elements (UTC) | 2021 Apr 16 04:12 | 2021 Apr 16 03:32 |
| Time of closest approach (UTC) | 2021 Mar 08 19:37:09.819 |
| Minimum distance | 31.519 km |
| Height difference | 0.660 km |
| Relative speed | 9.170 km/s |
| Angle between velocity vectors | 75° |
| Geographic position | 79.9°N, 104.8°W |
| Height | 698 km |
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