| Primary satellite | Secondary satellite |
| Name | Transit 4A | Kosmos-1141 |
| Spacetrack catalog number | 116 | 11585 |
| Radar cross section | medium | large |
| Epoch of two-line elements (UTC) | 2025 Apr 27 21:48 | 2025 Apr 28 04:10 |
| Time of closest approach (UTC) | 2024 Apr 18 07:19:19.865 |
| Minimum distance | 1521.491 km |
| Height difference | 5.924 km |
| Relative speed | 4.935 km/s |
| Angle between velocity vectors | 39° |
| Geographic position | 55.5°S, 75.4°W |
| Height | 980 km |
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