KELT-20b

KELT-20b, also known as MASCARA-2b, is an exoplanet announced in 2017. It is an Ultra-hot Jupiter orbiting an A-type star. The carbon monoxide, steam^[1][2] and neutral iron^[3] detection in the atmosphere of KELT-20b was announced in 2022.

KELT-20b

An artist's impression of ultra-hot Jupiter planet KELT-20b orbiting its host star.
Discovery
Discovery site	KELT
Discovery date	2017
Detection method	Transit method
Orbital characteristics
Semi-major axis	0.0542 AU
Orbital period (sidereal)	3.6127647 d = 3.474
Inclination	86.12
Star	KELT-20
Physical characteristics
Mean radius	1.741 RJ
Mass	<3.382 MJ
Mean density	<0.806 g cm−3

Host star

Main article: KELT-20

The host star is an A-type main-sequence star in the constellation of Cygnus having 2.282 solar masses, 1.617 solar radius and an apparent magnitude of 7.58.

See also

• Kilodegree Extremely Little Telescope
• Multi-site All-Sky CAmeRA