KELT (Kilodegree Extremely Little Telescope) was a pair
of automated (robotic) telescopes searching for transiting planets,
covering the magnitude range of +8 to +10.
Each telescope had a 4.2-cm aperture and a field of view of 26×26
degrees, with a 4k×4k CCD.
KELT-North, which began operation in 2005, was at Winer Observatory
in Arizona, and KELT-South in 2009, in South Africa.
Both ceased operation in 2023 after discovering 26 exoplanets and
collecting a large database of transients that covered most
of the sky.