| Primary satellite | Secondary satellite |
| Name | ALOS | IRIDIUM 33 DEB |
| Spacetrack catalog number | 28931 | 35853 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 17 20:48 | 2021 Jan 15 20:07 |
| Time of closest approach (UTC) | 2020 Dec 07 14:28:39.138 |
| Minimum distance | 434.805 km |
| Height difference | -0.040 km |
| Relative speed | 12.331 km/s |
| Angle between velocity vectors | 110° |
| Geographic position | 81.2°S, 88.3°E |
| Height | 712 km |
|