| 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 13:30:09.584 |
| Minimum distance | 5.446 km |
| Height difference | 0.750 km |
| Relative speed | 15.123 km/s |
| Angle between velocity vectors | 178° |
| Geographic position | 62.9°N, 155.3°W |
| Height | 608 km |
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