| Primary satellite | Secondary satellite |
| Name | Cosmos 1386 Rocket | Kiku-4 |
| Spacetrack catalog number | 13354 | 13492 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2025 Nov 13 06:00 | 2025 Nov 13 05:52 |
| Time of closest approach (UTC) | 2025 Oct 19 22:41:28.095 |
| Minimum distance | 4.111 km |
| Height difference | -0.431 km |
| Relative speed | 4.916 km/s |
| Angle between velocity vectors | 39° |
| Geographic position | 9.9°S, 135.9°W |
| Height | 1001 km |
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