| Primary satellite | Secondary satellite |
| Name | Cosmos 1300 Rocket | COSMOS 2535 |
| Spacetrack catalog number | 12786 | 44421 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2021 Jan 19 16:15 | 2021 Jan 19 13:58 |
| Time of closest approach (UTC) | 2020 Dec 06 14:10:40.984 |
| Minimum distance | 0.985 km |
| Height difference | -0.316 km |
| Relative speed | 15.069 km/s |
| Angle between velocity vectors | 179° |
| Geographic position | 69.8°S, 97.3°W |
| Height | 641 km |
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