2009: Prof. Bob Twiggs Proposes the 50×50×50 mm (1P) ‘PocketQube’ Standard to Bring University Launch Costs Within Classroom Reach
Ten years after co-inventing the 10 cm CubeSat, Prof. Robert J. Twiggs introduced the 5 cm PocketQube (1P = 50×50×50 mm, ≤ 250 g) at the 2009 CubeSat Workshop.
By 2009, the 1U CubeSat (100×100×113.5 mm) had become a global engineering success, yet rising launch integration fees were pricing undergraduate and high-school classroom teams out of orbit.
In 2009, Prof. Robert J. Twiggs—collaborating with Morehead State University and Kentucky Space—proposed shrinking the unit cube edge by half to 50×50×50 mm (125 cm³, one-eighth the volume of a 1U CubeSat) so that a functional satellite could fit inside a shirt pocket: the PocketQube.
Developed initially in collaboration with Prof. Filippo Graziani’s team at GAUSS Srl (Sapienza University of Rome) and later formalized in July 2018 as Issue 1 of the PocketQube Standard by Alba Orbital, TU Delft, and GAUSS Srl, the 1P–3P PocketQube architecture established a new picosatellite class.
CELESTRAK SATCAT & TELEMETRY RECORD
Verified Spacecraft Key Facts & Orbital Dossier
| Spacecraft | Class | Operator / Country | Launch & Vehicle | NORAD / COSPAR | Orbit & RF Downlink | Catalog Status |
|---|---|---|---|---|---|---|
$50SAT | 1.5P | Morehead State Univ. US | Dnepr · UniSat-5 (MRFOD) | NORAD 39436 2013-066W | UHF | Decayed |
Catalogued Mission Summaries & Flight Notes
- $50SAT (1.5P, 2013):
- Amateur-radio demonstrator built by Morehead State University and three radio amateurs from parts costing less than US$250, emblematic of the class’s low-cost philosophy.