![HD 136352 c: 3-Planet System, 0.172 AU Out](https://cdn.slatesource.com/0/d/c/0dcf60fa-b9f4-4e70-b7c1-2a9f0394704e.webp)

# HD 136352 c: 3-Planet System, 0.172 AU Out

- [Made in Slatesource](https://slatesource.com/@steph/hd-136352-c-3-planet-system-0-172-au-out)
- By [Steph](https://slatesource.com/@steph)
- Created on Sep 19, 2026

## 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.

journey·3 Planets

# HD 136352 from the inside out

Orbit

/

Planet

"super-Earth, 905 K.

"mini-Neptune, 677 K.

"mini-Neptune, 431 K.

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.

[Every parameter ever published for HD 136352 c, at the NASA Exoplanet Archive](https://exoplanetarchive.ipac.caltech.edu/overview/HD%20136352%20c?utm_source=slatesource)