| Primary satellite | Secondary satellite |
| Name | Courier 1B | Cosmos 911 Rocket |
| Spacetrack catalog number | 58 | 10020 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2023 Jun 03 14:16 | 2023 Jun 03 13:18 |
| Time of closest approach (UTC) | 2023 Mar 31 17:33:03.821 |
| Minimum distance | 114.264 km |
| Height difference | 0.683 km |
| Relative speed | 10.420 km/s |
| Angle between velocity vectors | 90° |
| Geographic position | 27.5°S, 135.2°E |
| Height | 1002 km |
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