| Primary satellite | Secondary satellite |
| Name | Cosmos 1346 Rocket | COSMOS 921 DEB |
| Spacetrack catalog number | 13121 | 39690 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2023 Mar 22 10:54 | 2023 Mar 21 08:34 |
| Time of closest approach (UTC) | 2023 Jan 30 07:10:19.704 |
| Minimum distance | 412.102 km |
| Height difference | -2.943 km |
| Relative speed | 13.927 km/s |
| Angle between velocity vectors | 133° |
| Geographic position | 56.4°N, 55.6°E |
| Height | 538 km |
|