| Primary satellite | Secondary satellite |
Name | Cosmos 1125 Rocket | COSMOS 2251 DEB |
Spacetrack catalog number | 11511 | 35661 |
Radar cross section | large | small |
Epoch of two-line elements (UTC) | 2021 Jan 16 12:51 | 2021 Jan 15 06:45 |
Time of closest approach (UTC) | 2020 Dec 03 23:11:26.908 |
Minimum distance | 80.289 km |
Height difference | 0.375 km |
Relative speed | 10.781 km/s |
Angle between velocity vectors | 93° |
Geographic position | 67.0°N, 129.5°E |
Height | 769 km |
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