| Primary satellite | Secondary satellite |
| Name | ARGOS | Cosmos 660 |
| Spacetrack catalog number | 25634 | 7337 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2023 Mar 30 10:59 | 2023 Mar 30 04:55 |
| Time of closest approach (UTC) | 2023 Feb 08 01:50:18.405 |
| Minimum distance | 228.155 km |
| Height difference | 103.890 km |
| Relative speed | 14.706 km/s |
| Angle between velocity vectors | 174° |
| Geographic position | 81.1°N, 170.8°E |
| Height | 841 km |
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