| Primary satellite | Secondary satellite |
| Name | PSLV DEB | Cosmos 1666 Rocket |
| Spacetrack catalog number | 27141 | 15890 |
| Radar cross section | medium | large |
| Epoch of two-line elements (UTC) | 2024 Dec 23 02:29 | 2024 Dec 23 02:26 |
| Time of closest approach (UTC) | 2024 Dec 24 08:35:52.127 |
| Minimum distance | 1.983 km |
| Height difference | -1.586 km |
| Relative speed | 15.078 km/s |
| Angle between velocity vectors | 179° |
| Geographic position | 54.2°S, 176.5°E |
| Height | 633 km |
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