| Primary satellite | Secondary satellite |
| Name | ASTRO E2 | BIROS |
| Spacetrack catalog number | 28773 | 41604 |
| Radar cross section | large | medium |
| Epoch of two-line elements (UTC) | 2023 Mar 20 22:56 | 2023 Mar 21 02:50 |
| Time of closest approach (UTC) | 2023 Feb 01 21:52:49.032 |
| Minimum distance | 470.822 km |
| Height difference | -1.146 km |
| Relative speed | 13.655 km/s |
| Angle between velocity vectors | 127° |
| Geographic position | 7.5°N, 150.9°E |
| Height | 497 km |
|