TOI-257 b is a Gas Giant exoplanet (a massive planet composed primarily of hydrogen and helium), about 7.2 times the radius of Earth. Its scorching equilibrium temperature of 1027 K (754°C) makes it far too hot for liquid water. The planet completes one orbit around its star every 18.4 Earth days. It was discovered in 2021 using the transit method. It orbits the star TOI-257, located approximately 77 parsecs (251 light-years) from Earth.
2021
Discovered
43.9
Earth Masses
7.16
Earth Radii
1027
Temperature (K)
Discovery Information
Orbital Properties
Physical Properties
Where TOI-257 b sits on the spectrum of all known exoplanets.
7.16x Earth's radius (0.64x Jupiter)
What If You Lived Here?
59.8 kg
Your weight (from 70 kg)
0.85g
Earth-like
Feels just like home — comfortably familiar.
18.4 Earth days
Year length
Unknown sunrise
Test Your Knowledge
Related Research
Loading papers...