| Primary satellite | Secondary satellite |
| Name | Cosmos 1666 Rocket | ERS 1 DEB |
| Spacetrack catalog number | 15890 | 35258 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2022 Jul 04 04:08 | 2022 Jul 03 15:39 |
| Time of closest approach (UTC) | 2022 May 27 15:50:11.232 |
| Minimum distance | 351.867 km |
| Height difference | 0.127 km |
| Relative speed | 14.968 km/s |
| Angle between velocity vectors | 167° |
| Geographic position | 71.6°S, 134.9°W |
| Height | 647 km |
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