| Primary satellite | Secondary satellite |
| Name | Cosmos 2123 Rocket | Kosmos-1709 |
| Spacetrack catalog number | 21090 | 16368 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2024 Sep 10 20:22 | 2024 Sep 10 21:41 |
| Time of closest approach (UTC) | 2024 Aug 15 10:51:16.899 |
| Minimum distance | 3.092 km |
| Height difference | 0.474 km |
| Relative speed | 14.387 km/s |
| Angle between velocity vectors | 155° |
| Geographic position | 55.4°S, 47.4°W |
| Height | 984 km |
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