| Primary satellite | Secondary satellite |
| Name | COSMOS 1275 DEB | Courier 1B |
| Spacetrack catalog number | 42120 | 58 |
| Radar cross section | small | large |
| Epoch of two-line elements (UTC) | 2024 Dec 20 05:14 | 2024 Dec 23 10:49 |
| Time of closest approach (UTC) | 2024 Dec 23 15:39:15.975 |
| Minimum distance | 3.782 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 | 1199 km |
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