Exoplanet

K2-118 b

Orbiting K2-118

Overview

K2-118 b is an exoplanet orbiting the star K2-118, discovered in 2017 using the Transit method. It is a Mini-Neptune world.

Key Measurements

Radius

2.54

Earth radii

015 R⊕

Mass (est.)

7.44

Earth masses

0500 M⊕

Orbital Period

50.9

days

0.1d10,000d

Distance

321.7

parsecs

Nearby10,000 pc

Radius (Earth radii)

2.54

Mass (Earth masses)

7.44

Estimated

Equilibrium Temperature

Unknown

Parameter source: Dressing et al. 2017

Orbital Period

50.921+0.006−0.005days

Semi-Major Axis

0.2450+0.0080−0.0080au

Eccentricity

0.2000+0.1838−0.1591

Argument of Periastron

58.7+75.9−123.4deg

Distance from Earth

321.7 pc (~1049 ly)

Spectral Type

Unknown

Temperature

4726 K

Mass (Solar)

0.76 M☉

Radius (Solar)

0.73 R☉

Luminosity

Unknown

Planets in System

1

Stars in System

1

Coordinates (RA, Dec)

132.1269°, 15.6559°

Discovery Method

Transit

Discovery Year

2017

Data Sources
NASA Exoplanet Archive

Source ID: K2-118 b

System Context

K2-118 b orbits K2-118 and was reported in 2017 and was detected with the Transit method.

Published measurements list a radius of 2.54 Earth radii, a mass of 7.44 Earth masses (estimated), and an orbital period of 50.92 days.

Catalog data places the system at about 321.7 parsecs from Earth and 1 known planet in the system.

Host star

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

Open K2-118
K2-118 b