2M0437 b

A confirmed exoplanet orbiting 2MASS J04372171+2651014.

Compared with Earth

Mass
About 1,271 times Earth's mass.
Temperature
About 1,177 °C (2,150 °F) from starlight alone, against -18 °C (-1 °F) for Earth measured the same way.

Planet

Radius
Unknown
Mass
1,271 × Earth
Density
Unknown
Equilibrium temperature
1,450 K
Starlight received
Unknown
Orbital period
Unknown
Average distance from its star
118 AU

Star

Host star
2MASS J04372171+2651014
Spectral class
M — red dwarf
Surface temperature
3,100 K
Radius
0.84 × Sun
Mass
0.17 × Sun
Age
0.0025 billion years

System

Distance from Earth
419.1 light-years (128.5 parsecs)
Stars in system
1
Known planets
1

Discovery

Year
2021
Method
Imaging
Facility
Subaru Telescope

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