| Primary satellite | Secondary satellite |
| Name | Cosmos 1603 | Star 26B S/N 007 |
| Spacetrack catalog number | 15333 | 7412 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2024 Sep 19 08:59 | 2024 Sep 19 09:17 |
| Time of closest approach (UTC) | 2024 Aug 17 14:35:28.151 |
| Minimum distance | 92.605 km |
| Height difference | -3.465 km |
| Relative speed | 8.538 km/s |
| Angle between velocity vectors | 70° |
| Geographic position | 65.2°S, 51.0°E |
| Height | 864 km |
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