| Primary satellite | Secondary satellite |
| Name | Cosmos 1825 | UNHA 3 R/B |
| Spacetrack catalog number | 17566 | 39027 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2023 Sep 22 04:13 | 2023 Sep 21 20:51 |
| Time of closest approach (UTC) | 2023 Jun 03 17:58:09.928 |
| Minimum distance | 2182.561 km |
| Height difference | -39.307 km |
| Relative speed | 15.190 km/s |
| Angle between velocity vectors | 169° |
| Geographic position | 28.6°S, 118.5°E |
| Height | 506 km |
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