Kepler-1209 b

A confirmed exoplanet orbiting Kepler-1209.

Compared with Earth

Size
About 1.5 times Earth's width.
Year
A year here lasts about 25 Earth days.

Planet

Radius
1.51 × Earth
Mass
Unknown
Density
Unknown
Equilibrium temperature
Unknown
Starlight received
Unknown
Orbital period
25.37 days
Average distance from its star
Unknown

Star

Host star
Kepler-1209
Spectral class
F — yellow-white
Surface temperature
6,210 K
Radius
1.38 × Sun
Mass
1.23 × Sun
Age
3.09 billion years

System

Distance from Earth
1,649 light-years (505.5 parsecs)
Stars in system
1
Known planets
1

Discovery

Year
2016
Method
Transit
Facility
Kepler

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