| Primary satellite | Secondary satellite |
| Name | Transit 4A | deb Delta 139 |
| Spacetrack catalog number | 116 | 14464 |
| Radar cross section | medium | small |
| Epoch of two-line elements (UTC) | 2025 May 14 01:44 | 2025 May 14 01:54 |
| Time of closest approach (UTC) | 2025 Apr 18 19:17:16.411 |
| Minimum distance | 39.037 km |
| Height difference | 3.880 km |
| Relative speed | 12.299 km/s |
| Angle between velocity vectors | 113° |
| Geographic position | 66.9°N, 162.0°E |
| Height | 964 km |
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