Exoplanet

K2-18 b

Orbiting K2-18

Overview

K2-18 b is an exoplanet orbiting the star K2-18, discovered in 2015 using the Transit method. It is a Super-Earth world.

Key Measurements

Radius

2.37

Earth radii

015 R⊕

Mass

8.92

Earth masses

0500 M⊕

Orbital Period

32.9

days

0.1d10,000d

Distance

38.0

parsecs

Nearby10,000 pc

Equilibrium Temp

284

K

150 K3,500 K

Radius (Earth radii)

2.37

Mass (Earth masses)

8.92

Measured

Equilibrium Temperature

284 K

Orbital Period

32.94 days

Distance from Earth

38.0 pc (~124 ly)

Spectral Type

Unknown

Temperature

3457 K

Mass (Solar)

0.36 M☉

Radius (Solar)

0.41 R☉

Luminosity

Unknown

Planets in System

2

Stars in System

1

Coordinates (RA, Dec)

172.5601°, 7.5878°

Discovery Method

Transit

Discovery Year

2015

Data Sources
NASA Exoplanet Archive

Source ID: K2-18 b

System Context

K2-18 b orbits K2-18 and was reported in 2015 and was detected with the Transit method.

Published measurements list a radius of 2.37 Earth radii, a mass of 8.92 Earth masses, an orbital period of 32.94 days, and an equilibrium temperature near 284 K.

Catalog data places the system at about 38 parsecs from Earth and 2 known planets in the system.

Host star

Explore the stellar record for this system to compare temperature, spectral type, and known planets.

Open K2-18

More planets in this system

K2-18 c