HD 21749 c
Orbiting GJ 143
HD 21749 c is an exoplanet orbiting the star GJ 143, discovered in 2019 using the Transit method. It is a Earth-sized world.
Radius
0.89
Earth radii
Mass
3.70
Earth masses
Orbital Period
7.8
days
Distance
16.3
parsecs
Equilibrium Temp
701
K
Radius (Earth radii)
0.89
Mass (Earth masses)
3.70
Measured
Equilibrium Temperature
701 K
Parameter source: Dragomir et al. 2019
Orbital Period
7.790+0.001−0.000days
Semi-Major Axis
0.0695+0.0021−0.0023au
Planet Mass (Earth masses)
3.70
Planet Mass (Jupiter masses)
0.0116
Epoch of Periastron
2458332.28+0.00−0.00days(BJD-TDB)
Radial Velocity Semi-Amplitude
<1.43m/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: HD 21749 c
HD 21749 c orbits GJ 143 and was reported in 2019 and was detected with the Transit method.
Published measurements list a radius of 0.89 Earth radii, a mass of 3.7 Earth masses, an orbital period of 7.79 days, and an equilibrium temperature near 701 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