QB50-US04 - Norad ID: 42702
| Spacetrack Directory Name | COLUMBIA (QBUS 4) |
| Alternative name | QB50-US04 |
| Orbit launches |
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| Deorbitation date |
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| Days in orbit | 7047 |
| Country/organisation of origin | USA (US) |
| Starting point | TYMSC (Baikonur Cosmodrome, Kazakhstan) |
| WWW | Here |
The scientific mission will be to use a Flux-?-Probe Experiment (FIPEX) to collect measurements of atomic and molecular oxygen on the Low Earth Orbit (LEO). QB50.