WASP-33 b: 2782 Kelvin
Gas giant around WASP-33
It is 1.59 times Jupiter's radius, closest in size to Jupiter, and 665.2 times Earth's mass, at 0.69 g/cm3, less dense than Earth. A year there lasts 1.22 days, on an orbit 16 times closer to its star than Mercury is to the Sun. Its equilibrium temperature is 2782 K, hotter than the surface of many stars. The host star WASP-33 runs at 7430 K with 1.50 times the Sun's mass.
Radius
17.86 Earth radii
Mass
665.2 Earth masses
Equilibrium temperature
2782 K (measured)
One year
1.22 days
Orbit radius
0.0239 AU
Host star
WASP-33 at 7430 K
Distance
398 light-years
Starlight blocked
1.282% at each transit
2782K: hot enough to vaporise rock on the dayside
What you get from the shadow
How deep the star dims fixes the planet's size relative to it.
Found by SuperWASP in 2010.
Size from the shadow, mass from elsewhere. Most transiting planets never get the second half, and without it composition stays a guess.
