| Primary satellite | Secondary satellite |
| Name | PDD Test Mass | IRIDIUM 33 DEB |
| Spacetrack catalog number | 20564 | 35488 |
| Radar cross section | medium | small |
| Epoch of two-line elements (UTC) | 2024 Dec 22 18:27 | 2024 Dec 22 17:55 |
| Time of closest approach (UTC) | 2024 Dec 24 07:06:48.723 |
| Minimum distance | 1.775 km |
| Height difference | 1.146 km |
| Relative speed | 14.965 km/s |
| Angle between velocity vectors | 171° |
| Geographic position | 64.5°S, 105.1°W |
| Height | 677 km |
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