TOI-2431 b: A Year In 5.4 Hours
Super-earth around TOI-2431
It is 1.53 times Earth's radius, closest in size to Earth, and 6.2 times Earth's mass, at 9.40 g/cm3, denser than Earth. A year there lasts 5.4 hours, on an orbit 61 times closer to its star than Mercury is to the Sun. Its equilibrium temperature is 2063 K, hot enough to vaporise rock. The host star TOI-2431 runs at 4109 K with 0.66 times the Sun's mass.
2063K: hot enough to vaporise rock on the dayside
Radius
1.53 Earth radii
Mass
6.2 Earth masses
Equilibrium temperature
2063 K (measured)
One year
5.4 hours
Orbit radius
0.0063 AU
Host star
TOI-2431 at 4109 K
Distance
118 light-years
Starlight blocked
0.047% at each transit
What the dip tells you
Block a known fraction of a known star and you have measured a width.
Two independent measurements sit behind this page: a dip in starlight for the size, and something else entirely for the mass. Together they make a density.
Found by Transiting Exoplanet Survey Satellite (TESS) in 2026. TESS scans most of the sky in 27-day stretches, so it favours bright nearby stars and short orbits over the faint distant ones Kepler specialised in.
