![HD 143811 AB b: 1.4 Times Jupiter](https://cdn.slatesource.com/2/1/5/215192fd-a0bc-4095-b30d-8c9f812479ea.webp)

# HD 143811 AB b: 1.4 Times Jupiter

- [Made in Slatesource](https://slatesource.com/@steph/hd-143811-ab-b-1-4-times-jupiter)
- By [Steph](https://slatesource.com/@steph)
- Created on Sep 19, 2026

## Gas giant around HD 143811 A

It is 1.40 times Jupiter's radius, closest in size to Jupiter, and 1938.8 times Earth's mass. A year there lasts 320.3 years, on an orbit 162.7 times Mercury's distance from the Sun. The host star HD 143811 A runs at 6791 K with 1.32 times the Sun's mass.

Radius

15.69 Earth radii

Mass

1938.8 Earth masses

One year

320.3 years

Orbit radius

63.0000 AU

Host star

HD 143811 A at 6791 K

Distance

446 light-years

**1.4x** Jupiter: among the largest planets measured

What the archive holds on this planet

0%

A size. Yes.

A measured mass. Yes.

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

An orbital distance. Yes.

A temperature someone observed rather than calculated. No.

An eccentricity, so we know if the orbit is a circle. Yes.

What the picture gives

Where it is, how bright it is, and a spectrum taken from the planet directly.

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.

Found by Paranal Observatory in 2025.

# 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: source data, including the values not used here](https://exoplanetarchive.ipac.caltech.edu/overview/HD%20143811%20AB%20b?utm_source=slatesource)