| Primary satellite | Secondary satellite |
| Name | Cosmos 1271 Rocket | HAWK-5B |
| Spacetrack catalog number | 12465 | 52756 |
| Radar cross section | large | medium |
| Epoch of two-line elements (UTC) | 2026 Jan 19 07:32 | 2026 Jan 19 05:17 |
| Time of closest approach (UTC) | 2025 Dec 16 07:35:38.652 |
| Minimum distance | 70.660 km |
| Height difference | 1.522 km |
| Relative speed | 12.050 km/s |
| Angle between velocity vectors | 104° |
| Geographic position | 79.9°S, 69.5°E |
| Height | 463 km |
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