| Primary satellite | Secondary satellite |
| Name | Cosmos 1812 | FLOCK 4Y 31 |
| Spacetrack catalog number | 17295 | 55078 |
| Radar cross section | large | medium |
| Epoch of two-line elements (UTC) | 2024 Sep 06 22:54 | 2024 Sep 06 17:25 |
| Time of closest approach (UTC) | 2024 Aug 11 14:08:34.091 |
| Minimum distance | 201.940 km |
| Height difference | -6.121 km |
| Relative speed | 14.842 km/s |
| Angle between velocity vectors | 154° |
| Geographic position | 82.2°S, 161.6°E |
| Height | 498 km |
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