![HATS-70 b: 2730 Kelvin](https://cdn.slatesource.com/f/0/a/f0a78ce3-79ff-4bc0-a43e-a294ead95011.webp)

# HATS-70 b: 2730 Kelvin

- [Made in Slatesource](https://slatesource.com/@steph/hats-70-b-2730-kelvin)
- By [Steph](https://slatesource.com/@steph)
- Created on Sep 19, 2026

## 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

**2730** K: 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.

[NASA Exoplanet Archive: source data, including the values not used here](https://exoplanetarchive.ipac.caltech.edu/overview/HATS-70%20b?utm_source=slatesource)