GJ 3138 b
Orbiting GJ 3138
GJ 3138 b is an exoplanet orbiting the star GJ 3138, discovered in 2017 using the Radial Velocity method.
Minimum Mass (M sin i)
1.78
Earth masses
Orbital Period
1.2
days
Distance
28.5
parsecs
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+0.000−0.000days
Semi-Major Axis
0.0197+0.0005−0.0005au
M sin(i) (Earth masses)
1.78+0.34−0.33
M sin(i) (Jupiter masses)
0.0056+0.0011−0.0010
Eccentricity
0.1900+0.1800−0.1300
Radial Velocity Semi-Amplitude
1.43+0.27−0.26m/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
Source ID: GJ 3138 b
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