| Primary satellite | Secondary satellite |
| Name | CAS-4B | RAPIS-1 |
| Spacetrack catalog number | 42759 | 43932 |
| Radar cross section | medium | medium |
| Epoch of two-line elements (UTC) | 2021 Feb 24 20:04 | 2021 Feb 24 08:40 |
| Time of closest approach (UTC) | 2021 Jan 23 15:40:06.435 |
| Minimum distance | 2.293 km |
| Height difference | 1.104 km |
| Relative speed | 14.162 km/s |
| Angle between velocity vectors | 138° |
| Geographic position | 17.0°N, 59.9°E |
| Height | 542 km |
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