| Primary satellite | Secondary satellite |
| Name | GEOS 3 Rocket | COSMOS 2491 DEB |
| Spacetrack catalog number | 7735 | 45128 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2023 Dec 05 16:44 | 2023 Nov 28 01:13 |
| Time of closest approach (UTC) | 2023 Oct 08 07:08:27.540 |
| Minimum distance | 344.752 km |
| Height difference | 0.648 km |
| Relative speed | 14.729 km/s |
| Angle between velocity vectors | 162° |
| Geographic position | 36.0°S, 14.3°W |
| Height | 801 km |
|