| 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 12 08:57 | 2021 Apr 12 00:07 |
| Time of closest approach (UTC) | 2021 Feb 28 17:33:05.639 |
| Minimum distance | 1110.589 km |
| Height difference | -8.808 km |
| Relative speed | 14.686 km/s |
| Angle between velocity vectors | 154° |
| Geographic position | 47.4°S, 172.4°E |
| Height | 634 km |
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