| Primary satellite | Secondary satellite |
| Name | CAS-6 | Cosmos 1151 Rocket |
| Spacetrack catalog number | 44881 | 11672 |
| Radar cross section | medium | large |
| Epoch of two-line elements (UTC) | 2021 Feb 28 01:08 | 2021 Feb 27 19:10 |
| Time of closest approach (UTC) | 2021 Jan 20 08:33:41.869 |
| Minimum distance | 4.359 km |
| Height difference | -0.041 km |
| Relative speed | 15.102 km/s |
| Angle between velocity vectors | 179° |
| Geographic position | 62.0°N, 162.8°W |
| Height | 626 km |
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