| Primary satellite | Secondary satellite |
| Name | Transit 4A | Cosmos 1304 Rocket |
| Spacetrack catalog number | 116 | 12804 |
| Radar cross section | medium | large |
| Epoch of two-line elements (UTC) | 2026 Jan 13 02:20 | 2026 Jan 13 10:02 |
| Time of closest approach (UTC) | 2025 Dec 15 06:00:17.541 |
| Minimum distance | 1.747 km |
| Height difference | 1.547 km |
| Relative speed | 14.092 km/s |
| Angle between velocity vectors | 146° |
| Geographic position | 27.6°N, 26.2°W |
| Height | 943 km |
|