| Primary satellite | Secondary satellite |
| Name | ASTEX 1 | IRIDIUM 33 DEB |
| Spacetrack catalog number | 5560 | 34690 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2024 Dec 22 14:21 | 2024 Dec 22 20:12 |
| Time of closest approach (UTC) | 2024 Dec 26 13:24:44.742 |
| Minimum distance | 2.900 km |
| Height difference | 1.842 km |
| Relative speed | 15.004 km/s |
| Angle between velocity vectors | 179° |
| Geographic position | 39.5°N, 104.5°W |
| Height | 720 km |
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