KELT-20KELT-20, also known as MASCARA-2, is an A2 main sequence star in the constellation of Cygnus, about 447 light years away.NomenclatureKELT-20 is the star's Kilodegree [Extremely Little Telescope|KELT] designation. It is also designated as MASCARA-2 meaning that it is the second star observed by the MASCARA exoplanet search program. Its Henry [Draper Catalogue] designation is HD 185603, and its Hipparcos designation is HIP 96618.Planetary systemIn 2017, the discovery of the planet KELT-20b was announced.