HATS-70 b: 2730 Kelvin
Gas giant around HATS-70
It is 1.38 times Jupiter's radius, closest in size to Jupiter, and 4100.0 times Earth's mass, at 6.64 g/cm3, denser than Earth. A year there lasts 1.89 days, on an orbit 11 times closer to its star than Mercury is to the Sun. Its equilibrium temperature is 2730 K, hotter than the surface of many stars. The host star HATS-70 runs at 7930 K with 1.78 times the Sun's mass.
Radius
15.51 Earth radii
Mass
4100.0 Earth masses
Equilibrium temperature
2730 K (measured)
One year
1.89 days
Orbit radius
0.0363 AU
Host star
HATS-70 at 7930 K
Distance
4758 light-years
Starlight blocked
0.570% at each transit
2730K: 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.
A transit gives the radius and a separate measurement gives the mass. Having both is what makes a density, and a density is the only clue to composition at this range.
Found by HATSouth in 2019.
