| Primary satellite | Secondary satellite |
| Name | Cosmos 1356 Rocket | BUGSAT 1 |
| Spacetrack catalog number | 13154 | 40014 |
| Radar cross section | large | medium |
| Epoch of two-line elements (UTC) | 2021 Feb 27 21:26 | 2021 Feb 27 21:48 |
| Time of closest approach (UTC) | 2021 Jan 25 11:15:45.978 |
| Minimum distance | 6.571 km |
| Height difference | 1.855 km |
| Relative speed | 15.097 km/s |
| Angle between velocity vectors | 178° |
| Geographic position | 60.1°N, 52.0°E |
| Height | 607 km |
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