![CT Cha b: 2600 Kelvin](https://cdn.slatesource.com/e/6/6/e66afa3a-f5af-4e6f-bc87-909ce011ac45.webp)

# CT Cha b: 2600 Kelvin

- [Made in Slatesource](https://slatesource.com/@steph/ct-cha-b-2600-kelvin)
- By [Steph](https://slatesource.com/@steph)
- Created on Sep 19, 2026

## Gas giant around CT Cha

It is 2.20 times Jupiter's radius, closest in size to Jupiter, and 5403.0 times Earth's mass. Its equilibrium temperature is 2600 K, hotter than the surface of many stars.

Radius

24.66 Earth radii

Mass

5403.0 Earth masses

Equilibrium temperature

2600 K (measured)

Orbit radius

440.0000 AU

Distance

622 light-years

**2600** K: hot enough to vaporise rock on the dayside

Known and unknown, as the archive has it

0%

A radius from transit photometry. Yes.

A mass. Yes.

A density, so rock and gas can be told apart. No.

An orbital distance. Yes.

An observed temperature. Yes.

An eccentricity, so the orbit shape is known. No.

What the picture gives

A position, a brightness, and light that can be split into a spectrum.

Found by Paranal Observatory in 2007.

This is one of the rare planets that has actually been photographed. Fewer than a hundred of the thousands known were found this way, and they are mostly young giants far from their stars.

# Fewer than a hundred planets have been photographed rather than inferred. Does \\

seeing one directly change how real it feels to you?

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[NASA Exoplanet Archive: the full record for CT Cha b](https://exoplanetarchive.ipac.caltech.edu/overview/CT%20Cha%20b?utm_source=slatesource)