:INFO
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.

:STATS
[icon:TARGET] Radius | 15.69 Earth radii
[icon:CHART] Mass | 1938.8 Earth masses
[icon:CLOCK] One year | 320.3 years
[icon:BOLT] Orbit radius | 63.0000 AU
[icon:STAR] Host star | HD 143811 A at 6791 K
[icon:USERS] Distance | 446 light-years

:COUNTER
1.4x Jupiter: among the largest planets measured

:CHECKLIST
What the archive holds on this planet
[ ] 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.

:PATH
What the picture gives
Where it is, how bright it is, and a spectrum taken from the planet directly.

:NOTE
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.

:NOTE
Found by Paranal Observatory in 2025.

:THREAD

:LINK
https://exoplanetarchive.ipac.caltech.edu/overview/HD%20143811%20AB%20b
NASA Exoplanet Archive: source data, including the values not used here