| Primary satellite | Secondary satellite |
| Name | Cosmos 1842 | FLOCK 4Y 15 |
| Spacetrack catalog number | 17911 | 55068 |
| Radar cross section | large | medium |
| Epoch of two-line elements (UTC) | 2023 Dec 03 13:39 | 2023 Dec 03 17:37 |
| Time of closest approach (UTC) | 2023 Oct 07 04:54:15.380 |
| Minimum distance | 694.101 km |
| Height difference | 1.337 km |
| Relative speed | 12.970 km/s |
| Angle between velocity vectors | 117° |
| Geographic position | 82.5°N, 88.9°E |
| Height | 525 km |
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