| Primary satellite | Secondary satellite |
| Name | Vanguard 1 Rocket | IRIDIUM 33 DEB |
| Spacetrack catalog number | 16 | 34376 |
| Radar cross section | medium | small |
| Epoch of two-line elements (UTC) | 2025 Jul 17 08:44 | 2025 Jul 17 14:04 |
| Time of closest approach (UTC) | 2024 Aug 06 22:57:50.019 |
| Minimum distance | 9458.758 km |
| Height difference | -1325.507 km |
| Relative speed | 14.087 km/s |
| Angle between velocity vectors | 150° |
| Geographic position | 22.8°N, 153.0°W |
| Height | 2012 km |
|