| Primary satellite | Secondary satellite |
| Name | CZ-6A DEB | Cosmos 660 |
| Spacetrack catalog number | 54511 | 7337 |
| Radar cross section | medium | large |
| Epoch of two-line elements (UTC) | 2025 May 14 20:30 | 2025 May 14 21:37 |
| Time of closest approach (UTC) | 2025 Apr 20 02:59:18.833 |
| Minimum distance | 5.082 km |
| Height difference | 3.408 km |
| Relative speed | 14.770 km/s |
| Angle between velocity vectors | 176° |
| Geographic position | 60.8°N, 33.3°E |
| Height | 870 km |
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