| Primary satellite | Secondary satellite |
| Name | Cosmos 1328 | OBJECT J |
| Spacetrack catalog number | 12987 | 51832 |
| Radar cross section | large | medium |
| Epoch of two-line elements (UTC) | 2023 Sep 24 12:05 | 2023 Sep 24 13:08 |
| Time of closest approach (UTC) | 2023 May 31 00:13:28.791 |
| Minimum distance | 992.572 km |
| Height difference | -6.188 km |
| Relative speed | 7.595 km/s |
| Angle between velocity vectors | 60° |
| Geographic position | 78.7°S, 11.4°W |
| Height | 574 km |
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