| Primary satellite | Secondary satellite |
| Name | Tiros 1 despin weight | E-STAR-II |
| Spacetrack catalog number | 115 | 41459 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2021 Mar 07 10:40 | 2021 Mar 07 19:34 |
| Time of closest approach (UTC) | 2021 Jan 23 22:15:58.663 |
| Minimum distance | 14.863 km |
| Height difference | 0.811 km |
| Relative speed | 13.776 km/s |
| Angle between velocity vectors | 133° |
| Geographic position | 38.1°S, 60.9°E |
| Height | 632 km |
|