| 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 01 21:06 | 2022 Jul 02 02:29 |
| Time of closest approach (UTC) | 2022 May 27 14:12:57.617 |
| Minimum distance | 330.143 km |
| Height difference | -0.085 km |
| Relative speed | 14.969 km/s |
| Angle between velocity vectors | 167° |
| Geographic position | 72.2°S, 111.4°W |
| Height | 647 km |
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