| Primary satellite | Secondary satellite |
| Name | Transit 4A | ERTS 1 |
| Spacetrack catalog number | 116 | 6126 |
| Radar cross section | medium | large |
| Epoch of two-line elements (UTC) | 2023 May 31 22:13 | 2023 Jun 01 05:06 |
| Time of closest approach (UTC) | 2023 Apr 05 23:12:51.590 |
| Minimum distance | 80.411 km |
| Height difference | 1.127 km |
| Relative speed | 13.954 km/s |
| Angle between velocity vectors | 141° |
| Geographic position | 63.6°N, 105.4°E |
| Height | 911 km |
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