Delfi-PQ

Also known as Delfi-PQ, TU Delft PocketQube, PQ9

Delft University of Technology’s 3P PocketQube launched on 13 January 2022 that flight-qualified the open PQ9 RS-485 avionics bus and micro-resistojet propulsion.

Document: SQ-MS-006
Updated: 21 Oct 2026
Reading time: 1 min

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TU Delft’s 3P technology pathfinder#

Delfi-PQ was a $3 P$ PocketQube ( $50 \times 50 \times 178 mm$ , $545 g$ , $58 \times 192 \times 1.6 mm$ ) developed at Delft University of Technology (TU Delft) as the successor to Delfi-C³ and Delfi-n3Xt[1][2]. Launched on 13 January 2022 aboard SpaceX Falcon 9 Transporter-3 from an v2 deployer into a $525 km$ Sun-synchronous orbit, it operated continuously until atmospheric re-entry on 6 January 2024 after $723 days$ in orbit[3].

References

[1]Delft University of Technology. (n.d.). Delfi-PQ.tudelft.nl(accessed 20 October 2026)
[2]Uludag, M. S., Yakut, E., Speretta, S., Radu, S., Chronas-Foteinakis, N., Bouwmeester, J., Menicucci, A., & Gill, E. (2019). Getting the Delfi-PQ ready for multiple launch options. In: International Symposium on Space Technology and Science (ISTS), Fukui (2019-f-08).pure.tudelft.nl
[3]nadir lab. (2026). PocketQube picosatellites: A review of standards, mission trends and miniaturization constraints, with lessons learned from Grizu-263A, Türkiye’s first PocketQube [Preprint]. nadir lab.Read on nadir lab.
[4]Bouwmeester, J. (2018). PQ9 and CS14 electrical and mechanical subsystem interface standard for PocketQubes and CubeSats, Version 1.0. DataverseNL.doi:10.34894/6MVBCZ
[5]Uludağ, M. S., & Speretta, S. (2025). Delfi-PQ: in-orbit performance and lessons learned in developing a 3P PocketQube. In: 76th International Astronautical Congress, Sydney (IAC-25-B4.6B.6) (609–623).doi:10.52202/083084-0062

Cite this SatWiki entry

@misc{nadirlab2026delfi,
  author       = {{nadir lab.}},
  title        = {{Delfi-PQ}},
  year         = {2026},
  month        = oct,
  howpublished = {nadir lab. SatWiki SQ-MS-006 (Rev. 1)},
  url          = {https://nadirlab.space/en/wiki/delfi-pq/}
}

nadir lab. (2026). Delfi-PQ. nadir lab. SatWiki (SQ-MS-006, Rev. 1). https://nadirlab.space/en/wiki/delfi-pq/

TY  - ENCYC
AU  - {nadir lab.}
TI  - Delfi-PQ
T2  - nadir lab. SatWiki
PY  - 2026
ET  - Rev. 1
C1  - SQ-MS-006
UR  - https://nadirlab.space/en/wiki/delfi-pq/
ER  -