| Primary satellite | Secondary satellite |
| Name | Cosmos 1842 | PROMETHEUS 2-3 |
| Spacetrack catalog number | 17911 | 41855 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2024 Dec 22 12:43 | 2024 Dec 22 11:30 |
| Time of closest approach (UTC) | 2024 Dec 25 17:19:42.370 |
| Minimum distance | 3.879 km |
| Height difference | 2.501 km |
| Relative speed | 15.238 km/s |
| Angle between velocity vectors | 179° |
| Geographic position | 36.9°S, 9.4°E |
| Height | 485 km |
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