KELT-24

KELT-24 (HD 93148, MASCARA-3) is a single star in the constellation Ursa Major at a distance of approximately 316 light-years (about 96.8 parsecs) from Sun. The apparent magnitude of the star is +8.33m. The star's age is estimated to be about 1.6 billion years. As an F-type main-sequence star, it is similar to the Sun, but slightly hotter and more luminous.

Nomenclature
This star was first catalogued in the Henry Draper Catalogue as HD 93148. The Henry Draper Catalogue gave stars visible to the naked eye in suitable conditions a designation, indicating that this star can be seen with the naked eye. But in 2019, the Multi-site All-Sky Camera and the Kilodegree Extremely Little Telescope announced the discovery of the exoplanet KELT-24b/MASCARA-3b around this star. Thus, it is most commonly known as KELT-24, although the star is sometimes catalogued as MASCARA-3.

Characteristics
KELT-24 is a yellow-white star with a spectral class of F5 or F7. Its mass is about 1.4, its radius is about 1.555 , and its luminosity is about 3.466. Its effective temperature is about 6437 K.

Planetary system
In 2019, the discovery of the Hot Jupiter type planet KELT-24b/MASCARA-3b was announced by the Multi-site All-Sky CAmeRA and the Kilodegree Extremely Little Telescope. TESS data confirmed that no additional companions are orbiting this star. Since this discovery, the system is now called KELT-24 or MASCARA-3.