WASP-20, also known as CD-24 102, is a binary star system in the equatorial constellation Cetus, located at a distance of about 940 light-years (290 parsecs) from the Sun. The primary star is an F-type main sequence star and hosts one confirmed exoplanet, WASP-20b.
Stellar properties WASP-20 is a star of spectral type F9, aged 3.6 billion years. Its mass is 10.09+0.05−0.02 solar masses for a radius of 1.14+0.08−0.01 solar radii, or a density of 0.73±0.17 grams per cubic centimeter.
Planetary system WASP-20b is a transiting hot Jupiter discovered in 2014. WASP-20b orbits WASP-20 in less than five Earth days very close to its star (0.06 AU) in a circular (near-zero eccentricity) orbit. The orbit is inclined by 85.56°±0.22° relative to the plane of the sky and is thus edge-on, as necessary for a transit to be observed.
See also Wide Angle Search for Planets Lists of planets
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