| Primary satellite | Secondary satellite |
| Name | COSMOS 2490 | COSMOS 2391 |
| Spacetrack catalog number | 39485 | 27465 |
| Radar cross section | large | medium |
| Epoch of two-line elements (UTC) | 2023 Sep 21 01:04 | 2023 Sep 20 21:58 |
| Time of closest approach (UTC) | 2023 Jun 13 11:11:02.587 |
| Minimum distance | 10.593 km |
| Height difference | -2.825 km |
| Relative speed | 14.125 km/s |
| Angle between velocity vectors | 164° |
| Geographic position | 15.5°S, 62.3°E |
| Height | 1483 km |
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