:INFO
Gas giant around GQ Lup
It is 3.00 times Jupiter's radius, closest in size to Jupiter, and 6356.0 times Earth's mass. Its equilibrium temperature is 2650 K, hotter than the surface of many stars.

:STATS
[icon:TARGET] Radius | 33.60 Earth radii
[icon:CHART] Mass | 6356.0 Earth masses
[icon:FIRE] Equilibrium temperature | 2650 K (measured)
[icon:BOLT] Orbit radius | 100.0000 AU
[icon:USERS] Distance | 493 light-years

:COUNTER
2650 K: hot enough to vaporise rock on the dayside

:CHECKLIST
Known and unknown, as the archive has it
[ ] A size. Yes.
[ ] A mass. Yes.
[ ] A density, the one clue to composition. No.
[ ] How far out it orbits. Yes.
[ ] A temperature someone observed rather than calculated. Yes.
[ ] The shape of the orbit. No.

:PATH
What a direct image buys you
A position, a brightness, and light that can be split into a spectrum.

:NOTE
Found by Paranal Observatory in 2004.

: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.

:THREAD

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