| Primary satellite | Secondary satellite |
| Name | GP-B | IRIDIUM 177 |
| Spacetrack catalog number | 28230 | 56727 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2024 Dec 04 20:28 | 2024 Dec 04 17:11 |
| Time of closest approach (UTC) | 2024 Nov 13 16:28:15.478 |
| Minimum distance | 12.706 km |
| Height difference | 8.234 km |
| Relative speed | 15.064 km/s |
| Angle between velocity vectors | 175° |
| Geographic position | 30.9°S, 58.4°W |
| Height | 634 km |
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