GJ 251 b
Orbiting GJ 251
GJ 251 b is an exoplanet orbiting the star GJ 251, discovered in 2020 using the Radial Velocity method.
Minimum Mass (M sin i)
3.85
Earth masses
Orbital Period
14.2
days
Distance
5.6
parsecs
Equilibrium Temp
336
K
Radius (Earth radii)
Unknown
Minimum Mass, M sin(i) (Earth masses)
3.85
Radial-velocity minimum
Equilibrium Temperature
336 K
Parameter source: Beard et al. 2025
Orbital Period
14.237+0.002−0.002days
Semi-Major Axis
0.0808+0.0042−0.0042au
M sin(i) (Earth masses)
3.85+0.35−0.33
M sin(i) (Jupiter masses)
0.0121+0.0011−0.0010
Eccentricity
0.0000
Argument of Periastron
0.0deg
Radial Velocity Semi-Amplitude
2.01+0.12−0.12m/s
Distance from Earth
5.6 pc (~18 ly)
Spectral Type
Unknown
Temperature
3342 K
Mass (Solar)
0.35 M☉
Radius (Solar)
0.36 R☉
Luminosity
-1.81 log L☉
Planets in System
2
Stars in System
1
Coordinates (RA, Dec)
103.7002°, 33.2665°
Discovery Method
Radial Velocity
Discovery Year
2020
Source ID: GJ 251 b
GJ 251 b orbits GJ 251 and was reported in 2020 and was detected with the Radial Velocity method.
Published measurements list a minimum mass of 3.85 Earth masses (M sin i), an orbital period of 14.24 days, and an equilibrium temperature near 336 K.
Catalog data places the system at about 5.6 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 GJ 251More planets in this system