| Primary satellite | Secondary satellite |
| Name | ALOS | IRIDIUM 33 DEB |
| Spacetrack catalog number | 28931 | 34099 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Apr 16 04:12 | 2021 Apr 15 16:33 |
| Time of closest approach (UTC) | 2021 Mar 05 11:02:39.828 |
| Minimum distance | 32.608 km |
| Height difference | 3.607 km |
| Relative speed | 2.548 km/s |
| Angle between velocity vectors | 20° |
| Geographic position | 53.7°N, 63.9°E |
| Height | 693 km |
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