| Primary satellite | Secondary satellite |
| Name | Cosmos 1300 Rocket | COSMOS 2535 DEB |
| Spacetrack catalog number | 12786 | 44633 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 19 16:15 | 2021 Jan 19 13:46 |
| Time of closest approach (UTC) | 2020 Dec 07 05:26:45.296 |
| Minimum distance | 5.516 km |
| Height difference | 1.906 km |
| Relative speed | 15.096 km/s |
| Angle between velocity vectors | 172° |
| Geographic position | 82.2°N, 126.1°E |
| Height | 623 km |
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