GJ 338 B b
Orbiting GJ 338 B
GJ 338 B b is an exoplanet orbiting the star GJ 338 B, discovered in 2020 using the Radial Velocity method.
Minimum Mass (M sin i)
10.60
Earth masses
Orbital Period
24.4
days
Distance
6.3
parsecs
Radius (Earth radii)
Unknown
Minimum Mass, M sin(i) (Earth masses)
10.60
Radial-velocity minimum
Equilibrium Temperature
Unknown
Parameter source: DiTomasso et al. 2023
Orbital Period
24.422+0.014−0.014days
Semi-Major Axis
0.1420+0.0050−0.0050au
M sin(i) (Earth masses)
10.60+1.20−1.20
M sin(i) (Jupiter masses)
0.0334+0.0038−0.0038
Eccentricity
0.1090+0.1000−0.0750
Radial Velocity Semi-Amplitude
3.19+0.27−0.27m/s
Distance from Earth
6.3 pc (~21 ly)
Spectral Type
M0 V
Temperature
4014 K
Mass (Solar)
0.64 M☉
Radius (Solar)
0.58 R☉
Luminosity
-1.10 log L☉
Planets in System
1
Stars in System
2
Coordinates (RA, Dec)
138.5917°, 52.6835°
Discovery Method
Radial Velocity
Discovery Year
2020
Source ID: GJ 338 B b
GJ 338 B b orbits GJ 338 B and was reported in 2020 and was detected with the Radial Velocity method.
Published measurements list a minimum mass of 10.6 Earth masses (M sin i) and an orbital period of 24.42 days.
Catalog data places the system at about 6.3 parsecs from Earth, a host star classified as M0 V, 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 GJ 338 B