The 60 cm f/8 Ritchey–Chrétien design telescopes and New Technology Mount NTM-500 were built by ASTELCO Systems, a company in Germany.

The CCD camera was built by Finger Lakes Instrumentation (USA), providing a 22 x 22 arcminutes field of view.

[2][3] The telescope condominium is a joint venture between the University of Liège, Belgium, and Geneva Observatory, Switzerland, and among other tasks, it specializes in searching for comets and exoplanets.

[5][6] A team of astronomers headed by Michaël Gillon, of the Institut d'Astrophysique et Géophysique at the University of Liège in Belgium, used the telescope to observe the ultracool dwarf star 2MASS J23062928-0502285, now also known as TRAPPIST-1.

[10] As with the other space observation projects of the University of Liège like SPECULOOS, Transiting Planets and Planetesimals Small Telescope makes up a backronym, referring to traditional Belgian Trappist beer.