description KELT-9 Overview
KELT-9 is a hot, rapidly rotating A-type main-sequence star located roughly 670 light-years away in the constellation Cygnus. It is highly notable for hosting KELT-9b, an ultra-hot Jupiter exoplanet that was the hottest known exoplanet at the time of its discovery. The planet's extreme dayside temperature, which exceeds 4,000 Kelvin, is a result of its incredibly close orbit around its highly luminous host star. This unique system provides astronomers with an extreme environment to study the atmospheric dynamics of gas giants.
insights Ranking position
KELT-9 ranks #81 of 212 in the Star ranking, behind Izar, ahead of Bellatrix.
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What is the planet KELT-9b?
KELT-9b is a gas giant exoplanet famous for being the hottest known hot Jupiter ever discovered. Its dayside temperature is so extreme that it exceeds 4,000 Kelvin, which is hotter than the surface of many cool stars.
What kind of star is KELT-9?
KELT-9 is an incredibly hot A-type star located about 670 light-years away in the constellation Cygnus. A-type stars burn very bright and hot, creating a punishing environment for any nearby celestial bodies.
Why is the exoplanet KELT-9b so hot?
The planet is subjected to blistering ultraviolet radiation because it orbits incredibly close to its massive, hot host star. The extreme heat is literally boiling the planet's atmosphere away, causing heavy metals like iron and titanium to vaporize in its clouds.
When was the KELT-9 system discovered?
The KELT-9 system and its extreme exoplanet were announced by astronomers in 2017. The discovery was made using the Kilodegree Extremely Little Telescope (KELT), which is designed specifically to hunt for transiting exoplanets around bright stars.
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