GJ 876 b
Orbiting GJ 876
GJ 876 b is an exoplanet orbiting the star GJ 876, discovered in 1998 using the Radial Velocity method.
Mass
723.22
Earth masses
Orbital Period
61.1
days
Distance
4.7
parsecs
Radius (Earth radii)
Unknown
Mass (Earth masses)
723.22
Measured
Equilibrium Temperature
Unknown
Parameter source: Rivera et al. 2010
Orbital Period
61.117+0.009−0.009days
Semi-Major Axis
0.2083+0.0000−0.0000au
Planet Mass (Earth masses)
723.22+1.43−1.43
Planet Mass (Jupiter masses)
2.2756+0.0045−0.0045
Eccentricity
0.0324+0.0013−0.0013
Epoch of Periastron
2450602.09days
Argument of Periastron
50.3+3.2−3.2deg
Radial Velocity Semi-Amplitude
214.00+0.42−0.42m/s
Distance from Earth
4.7 pc (~15 ly)
Spectral Type
Unknown
Temperature
Unknown
Mass (Solar)
0.32 M☉
Radius (Solar)
0.30 R☉
Luminosity
-1.91 log L☉
Planets in System
4
Stars in System
1
Coordinates (RA, Dec)
343.3240°, -14.2666°
Discovery Method
Radial Velocity
Discovery Year
1998
Source ID: GJ 876 b
GJ 876 b orbits GJ 876 and was reported in 1998 and was detected with the Radial Velocity method.
Published measurements list a mass of 723.22 Earth masses and an orbital period of 61.12 days.
Catalog data places the system at about 4.7 parsecs from Earth and 4 known planets in the system.
Host star
Explore the stellar record for this system to compare temperature, spectral type, and known planets.
Open GJ 876