QB50-US01 - Norad ID: 42721
| Spacetrack Directory Name | CHALLENGER (QBUS 1) |
| Alternative name | QB50-US01 |
| Orbit launches |
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| Deorbitation date |
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| Days in orbit | 7205 |
| Country/organisation of origin | USA (US) |
| Starting point | TYMSC (Baikonur Cosmodrome, Kazakhstan) |
| WWW | Here |
Carries the Ion/Neutral Mass Spectrometer (INMS), which measures the mass of ions and neutral atoms. QB50.