| Primary satellite | Secondary satellite |
| Name | Courier 1B | COSMOS 1275 DEB |
| Spacetrack catalog number | 58 | 42120 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2024 Dec 22 11:41 | 2024 Dec 20 05:14 |
| Time of closest approach (UTC) | 2024 Dec 23 15:39:15.975 |
| Minimum distance | 3.779 km |
| Height difference | -2.276 km |
| Relative speed | 8.847 km/s |
| Angle between velocity vectors | 76° |
| Geographic position | 27.8°S, 68.0°W |
| Height | 1201 km |
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