The Transiting Planets and Planetesimals Small Telescope (TRAPPIST) is a Belgian, remote and robotic telescope in Chile, which came online in 2010. It is named in homage to Trappists in the Belgian region.
Situated high in the Chilean mountains at ESO's La Silla Observatory, it is actually controlled from Liege, Belgium with some autonomous features. It is a reflecting telescope 0.60 m (23.5″) in aperture diameter and is housed in the dome of the retired Swiss T70 telescope.
In November 2010, it was one of the few telescopes that observed a stellar occultation of the planetary body Eris, revealing that it may be smaller than Pluto, and it helped observe a stellar occultation by Makemake, when it passed in front of the star NOMAD 1181-0235723. The observations of this event showed it lacked a significant atmosphere.
- http://www.ati.ulg.ac.be TRAPPIST – The Trappist Order: a lifestyle
- "New National Telescope at La Silla—TRAPPIST to Scout the Sky and Uncover Exoplanets and Comets (eso1023 — Organisation Release)". http://www.eso.org/. ESO. 8 June 2010. Retrieved 4 January 2015.
- ScienceDaily, TRAPPIST Telescope to Scout the Sky and Uncover Exoplanets and Comets, 9 June 2010
- Newscientist.com, Kelly Beatty - Former 'tenth planet' may be smaller than Pluto, November 2010
- Dwarf Planet Makemake Lacks Atmosphere (ESO : 21 November 2012)
- Carlsberg Meridian Telescope, brewery related telescope