Exoplanet

GJ 3138 b

Orbiting GJ 3138

Overview

GJ 3138 b is an exoplanet orbiting the star GJ 3138, discovered in 2017 using the Radial Velocity method.

Key Measurements

Minimum Mass (M sin i)

1.78

Earth masses

0500 M⊕

Orbital Period

1.2

days

0.1d10,000d

Distance

28.5

parsecs

Nearby10,000 pc

Radius (Earth radii)

Unknown

Minimum Mass, M sin(i) (Earth masses)

1.78

Radial-velocity minimum

Equilibrium Temperature

Unknown

Parameter source: Astudillo-Defru et al. 2017

Orbital Period

1.220+0.0000.000days

Semi-Major Axis

0.0197+0.00050.0005au

M sin(i) (Earth masses)

1.78+0.340.33

M sin(i) (Jupiter masses)

0.0056+0.00110.0010

Eccentricity

0.1900+0.18000.1300

Radial Velocity Semi-Amplitude

1.43+0.270.26m/s

Distance from Earth

28.5 pc (~93 ly)

Spectral Type

M0

Temperature

3717 K

Mass (Solar)

0.68 M☉

Radius (Solar)

0.50 R☉

Luminosity

-1.35 log L☉

Planets in System

3

Stars in System

1

Coordinates (RA, Dec)

32.2977°, -16.3392°

Discovery Method

Radial Velocity

Discovery Year

2017

Data Sources

Source ID: GJ 3138 b

System Context

GJ 3138 b orbits GJ 3138 and was reported in 2017 and was detected with the Radial Velocity method.

Published measurements list a minimum mass of 1.78 Earth masses (M sin i) and an orbital period of 1.22 days.

Catalog data places the system at about 28.5 parsecs from Earth, a host star classified as M0, and 3 known planets in the system.

Host star

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

Open GJ 3138

More planets in this system

GJ 3138 b