| Primary satellite | Secondary satellite |
| Name | Cosmos 1346 Rocket | FLOCK 4Y 35 |
| Spacetrack catalog number | 13121 | 55057 |
| Radar cross section | large | medium |
| Epoch of two-line elements (UTC) | 2023 Mar 25 21:29 | 2023 Mar 25 18:08 |
| Time of closest approach (UTC) | 2023 Feb 02 07:23:08.658 |
| Minimum distance | 159.533 km |
| Height difference | -1.085 km |
| Relative speed | 15.163 km/s |
| Angle between velocity vectors | 179° |
| Geographic position | 41.0°S, 139.8°W |
| Height | 551 km |
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