HD 136352 c: 3-Planet System, 0.172 AU Out
Mini-neptune around HD 136352
It is 2.92 times Earth's radius, closest in size to Neptune, and 11.2 times Earth's mass, at 2.50 g/cm3, less dense than Earth. A year there lasts 27.59 days, on an orbit 2 times closer to its star than Mercury is to the Sun. Its equilibrium temperature is 677 K, hotter than any desert. The host star HD 136352 runs at 5664 K with 0.87 times the Sun's mass.
HD 136352 from the inside out
Orbit
/
Planet
Radius
2.92 Earth radii
Mass
11.2 Earth masses
Equilibrium temperature
677 K (measured)
One year
27.59 days
Orbit radius
0.1721 AU
Host star
HD 136352 at 5664 K
Distance
48 light-years
What the wobble gives
A minimum mass, from how fast the star moves toward and away from us.
This planet was found by the wobble it induces in its star, which measures mass rather than size. A radius quoted for such a planet usually comes from a later transit or from a model.
Found by La Silla Observatory in 2019.
HD 136352 has 3 known planets. Multi-planet systems are where orbital dynamics can be measured rather than assumed.
