GJ 887 b
Orbiting GJ 887
GJ 887 b is an exoplanet orbiting the star GJ 887, discovered in 2020 using the Radial Velocity method.
Minimum Mass (M sin i)
3.90
Earth masses
Orbital Period
9.3
days
Distance
3.3
parsecs
Equilibrium Temp
426
K
Radius (Earth radii)
Unknown
Minimum Mass, M sin(i) (Earth masses)
3.90
Radial-velocity minimum
Equilibrium Temperature
426 K
Parameter source: Hartogh et al. 2026
Orbital Period
9.262+0.001−0.001days
Semi-Major Axis
0.0683+0.0022−0.0024au
M sin(i) (Earth masses)
3.90+0.50−0.50
M sin(i) (Jupiter masses)
0.0123+0.0016−0.0016
Eccentricity
0.1400+0.0600−0.0600
Argument of Periastron
180.0+130.0−130.0deg
Radial Velocity Semi-Amplitude
2.00+0.17−0.17m/s
Distance from Earth
3.3 pc (~11 ly)
Spectral Type
M1 V
Temperature
3688 K
Mass (Solar)
0.49 M☉
Radius (Solar)
0.47 R☉
Luminosity
-1.43 log L☉
Planets in System
4
Stars in System
1
Coordinates (RA, Dec)
346.5028°, -35.8473°
Discovery Method
Radial Velocity
Discovery Year
2020
Source ID: GJ 887 b
GJ 887 b orbits GJ 887 and was reported in 2020 and was detected with the Radial Velocity method.
Published measurements list a minimum mass of 3.9 Earth masses (M sin i), an orbital period of 9.26 days, and an equilibrium temperature near 426 K.
Catalog data places the system at about 3.3 parsecs from Earth, a host star classified as M1 V, 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 887