| Primary satellite | Secondary satellite |
| Name | Cosmos 1603 | CZ-6A DEB |
| Spacetrack catalog number | 15333 | 54451 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2026 Jan 13 09:55 | 2026 Jan 12 08:52 |
| Time of closest approach (UTC) | 2025 Dec 17 01:44:10.834 |
| Minimum distance | 296.150 km |
| Height difference | 0.940 km |
| Relative speed | 4.981 km/s |
| Angle between velocity vectors | 39° |
| Geographic position | 42.8°N, 119.0°E |
| Height | 839 km |
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