| Primary satellite | Secondary satellite |
| Name | Cosmos 1812 | FLOCK 4Y 16 |
| Spacetrack catalog number | 17295 | 55040 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2024 Sep 16 11:17 | 2024 Sep 16 10:57 |
| Time of closest approach (UTC) | 2024 Aug 11 17:20:39.488 |
| Minimum distance | 254.614 km |
| Height difference | -2.951 km |
| Relative speed | 14.831 km/s |
| Angle between velocity vectors | 154° |
| Geographic position | 80.3°S, 169.5°E |
| Height | 497 km |
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