| Primary satellite | Secondary satellite |
| Name | Cosmos 1707 | YAOGAN 21 |
| Spacetrack catalog number | 16326 | 40143 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2023 Dec 10 15:49 | 2023 Dec 11 03:48 |
| Time of closest approach (UTC) | 2023 Sep 25 18:30:05.147 |
| Minimum distance | 4550.929 km |
| Height difference | -14.015 km |
| Relative speed | 15.217 km/s |
| Angle between velocity vectors | 174° |
| Geographic position | 6.4°N, 7.9°E |
| Height | 503 km |
|