| Primary satellite | Secondary satellite |
| Name | Cosmos 1603 | CZ-6A DEB |
| Spacetrack catalog number | 15333 | 56676 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2025 May 14 10:24 | 2025 May 14 06:43 |
| Time of closest approach (UTC) | 2025 Apr 27 20:02:04.070 |
| Minimum distance | 2.016 km |
| Height difference | -1.840 km |
| Relative speed | 9.540 km/s |
| Angle between velocity vectors | 80° |
| Geographic position | 67.2°N, 167.3°E |
| Height | 848 km |
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