| Primary satellite | Secondary satellite |
| Name | Cosmos 1328 | NETSAT-4 |
| Spacetrack catalog number | 12987 | 46504 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2023 Sep 22 04:33 | 2023 Sep 22 02:33 |
| Time of closest approach (UTC) | 2023 Jun 02 09:46:03.857 |
| Minimum distance | 15.820 km |
| Height difference | -11.782 km |
| Relative speed | 15.169 km/s |
| Angle between velocity vectors | 180° |
| Geographic position | 33.7°S, 123.1°W |
| Height | 557 km |
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