| Primary satellite | Secondary satellite |
| Name | Cosmos 1603 | CZ-2D DEB |
| Spacetrack catalog number | 15333 | 38323 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2026 Jan 13 09:55 | 2026 Jan 11 02:20 |
| Time of closest approach (UTC) | 2025 Dec 14 08:58:05.877 |
| Minimum distance | 4.992 km |
| Height difference | -1.978 km |
| Relative speed | 14.287 km/s |
| Angle between velocity vectors | 147° |
| Geographic position | 66.7°N, 90.2°W |
| Height | 855 km |
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