GJ 143 b
Orbiting GJ 143
GJ 143 b is an exoplanet orbiting the star GJ 143, discovered in 2019 using the Transit method. It is a Mini-Neptune world.
Radius
2.61
Earth radii
Mass
22.70
Earth masses
Orbital Period
35.6
days
Distance
16.3
parsecs
Equilibrium Temp
422
K
Radius (Earth radii)
2.61
Mass (Earth masses)
22.70
Measured
Equilibrium Temperature
422 K
Parameter source: Dragomir et al. 2019
Orbital Period
35.613+0.001−0.001days
Semi-Major Axis
0.1915+0.0058−0.0063au
Planet Mass (Earth masses)
22.70+2.20−1.90
Planet Mass (Jupiter masses)
0.0714+0.0069−0.0060
Eccentricity
0.1880+0.0760−0.0780
Epoch of Periastron
2458350.80+1.60−1.10days(BJD-TDB)
Argument of Periastron
98.0+21.0−17.0deg
Radial Velocity Semi-Amplitude
5.51+0.41−0.33m/s
Distance from Earth
16.3 pc (~53 ly)
Spectral Type
K4.5
Temperature
4640 K
Mass (Solar)
0.73 M☉
Radius (Solar)
0.69 R☉
Luminosity
-0.69 log L☉
Planets in System
2
Stars in System
1
Coordinates (RA, Dec)
51.7502°, -63.5002°
Discovery Method
Transit
Discovery Year
2019
Source ID: GJ 143 b
GJ 143 b orbits GJ 143 and was reported in 2019 and was detected with the Transit method.
Published measurements list a radius of 2.61 Earth radii, a mass of 22.7 Earth masses, an orbital period of 35.61 days, and an equilibrium temperature near 422 K.
Catalog data places the system at about 16.3 parsecs from Earth, a host star classified as K4.5, 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 143More planets in this system