| Primary satellite | Secondary satellite |
| Name | Cosmos 2123 Rocket | ARIANE 1 DEB |
| Spacetrack catalog number | 21090 | 39107 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2024 Sep 08 14:17 | 2024 Sep 06 22:46 |
| Time of closest approach (UTC) | 2024 Aug 11 08:57:13.378 |
| Minimum distance | 40.969 km |
| Height difference | 1.677 km |
| Relative speed | 14.569 km/s |
| Angle between velocity vectors | 167° |
| Geographic position | 78.3°S, 145.0°W |
| Height | 991 km |
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