Kepler-438 b

A confirmed exoplanet orbiting Kepler-438.

Compared with Earth

Size
About 1.1 times Earth's width.
Starlight
About 1.4 times the starlight Earth gets from the Sun.
Year
A year here lasts about 35 Earth days.

Planet

Radius
1.12 × Earth
Mass
Unknown
Density
Unknown
Equilibrium temperature
Unknown
Starlight received
1.4 × Earth
Orbital period
35.23 days
Average distance from its star
0.166 AU

Star

Host star
Kepler-438
Spectral class
M — red dwarf
Surface temperature
3,748 K
Radius
0.52 × Sun
Mass
0.544 × Sun
Age
4.4 billion years

System

Distance from Earth
Unknown
Stars in system
1
Known planets
1

Discovery

Year
2015
Method
Transit
Facility
Kepler

Data from the NASA Exoplanet Archive, synced October 14, 2026.