| Primary satellite | Secondary satellite |
Name | Cosmos 1666 | Tandem-X |
Spacetrack catalog number | 15889 | 36605 |
Radar cross section | large | large |
Epoch of two-line elements (UTC) | 2023 Feb 01 06:47 | 2023 Feb 01 08:14 |
Time of closest approach (UTC) | 2022 Dec 05 15:21:59.517 |
Minimum distance | 234.446 km |
Height difference | 8.568 km |
Relative speed | 15.207 km/s |
Angle between velocity vectors | 176° |
Geographic position | 63.9°N, 120.0°W |
Height | 513 km |
|