| Primary satellite | Secondary satellite |
| Name | Cosmos 1603 | Cosmos 1980 Rocket |
| Spacetrack catalog number | 15333 | 19650 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2025 May 14 10:24 | 2025 May 15 04:24 |
| Time of closest approach (UTC) | 2025 Apr 28 22:10:26.203 |
| Minimum distance | 24.045 km |
| Height difference | 2.802 km |
| Relative speed | 10.913 km/s |
| Angle between velocity vectors | 95° |
| Geographic position | 61.3°S, 135.1°W |
| Height | 867 km |
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