| Primary satellite | Secondary satellite |
| Name | Cosmos 1666 Rocket | PSLV DEB |
| Spacetrack catalog number | 15890 | 27141 |
| Radar cross section | large | medium |
| Epoch of two-line elements (UTC) | 2024 Dec 22 16:44 | 2024 Dec 23 02:29 |
| Time of closest approach (UTC) | 2024 Dec 24 08:35:52.157 |
| Minimum distance | 1.977 km |
| Height difference | 1.569 km |
| Relative speed | 15.078 km/s |
| Angle between velocity vectors | 179° |
| Geographic position | 54.2°S, 176.5°E |
| Height | 632 km |
|