| Primary satellite | Secondary satellite |
| Name | Cosmos 1151 Rocket | IRIDIUM 33 DEB |
| Spacetrack catalog number | 11672 | 38016 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Apr 17 05:09 | 2021 Apr 16 12:24 |
| Time of closest approach (UTC) | 2021 Feb 28 17:30:56.999 |
| Minimum distance | 672.003 km |
| Height difference | -5.349 km |
| Relative speed | 14.650 km/s |
| Angle between velocity vectors | 153° |
| Geographic position | 55.0°S, 170.3°E |
| Height | 636 km |
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