| 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 11 20:46 | 2021 Apr 11 19:03 |
| Time of closest approach (UTC) | 2021 Mar 05 11:02:48.964 |
| Minimum distance | 153.719 km |
| Height difference | 3.531 km |
| Relative speed | 2.552 km/s |
| Angle between velocity vectors | 20° |
| Geographic position | 54.4°N, 63.6°E |
| Height | 693 km |
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