| Primary satellite | Secondary satellite |
| Name | DX 1 | Cosmos 1025 Rocket |
| Spacetrack catalog number | 40071 | 10974 |
| Radar cross section | medium | large |
| Epoch of two-line elements (UTC) | 2026 Jan 18 21:54 | 2026 Jan 18 21:44 |
| Time of closest approach (UTC) | 2025 Dec 10 14:18:27.080 |
| Minimum distance | 11.123 km |
| Height difference | -4.929 km |
| Relative speed | 15.085 km/s |
| Angle between velocity vectors | 178° |
| Geographic position | 63.1°S, 12.8°E |
| Height | 628 km |
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