HD 191939 c
Orbiting HD 191939
HD 191939 c is an exoplanet orbiting the star HD 191939, discovered in 2020 using the Transit method. It is a Mini-Neptune world.
Radius
3.19
Earth radii
Mass
8.00
Earth masses
Orbital Period
28.6
days
Distance
53.6
parsecs
Equilibrium Temp
600
K
Radius (Earth radii)
3.19
Mass (Earth masses)
8.00
Measured
Equilibrium Temperature
600 K
Parameter source: Orell-Miquel et al. 2023
Orbital Period
28.580+0.000−0.000days
Semi-Major Axis
0.1752+0.0055−0.0050au
Planet Mass (Earth masses)
8.00+1.00−1.00
Planet Mass (Jupiter masses)
0.0252+0.0031−0.0031
Eccentricity
0.0340+0.0340−0.0130
Argument of Periastron
-90.0+220.0−40.0deg
Radial Velocity Semi-Amplitude
1.93+0.23−0.24m/s
Distance from Earth
53.6 pc (~175 ly)
Spectral Type
G9 V
Temperature
5348 K
Mass (Solar)
0.81 M☉
Radius (Solar)
0.94 R☉
Luminosity
-0.19 log L☉
Planets in System
6
Stars in System
1
Coordinates (RA, Dec)
302.0256°, 66.8503°
Discovery Method
Transit
Discovery Year
2020
Source ID: HD 191939 c
HD 191939 c orbits HD 191939 and was reported in 2020 and was detected with the Transit method.
Published measurements list a radius of 3.2 Earth radii, a mass of 8 Earth masses, an orbital period of 28.58 days, and an equilibrium temperature near 600 K.
Catalog data places the system at about 53.6 parsecs from Earth, a host star classified as G9 V, and 6 known planets in the system.
Host star
Explore the stellar record for this system to compare temperature, spectral type, and known planets.
Open HD 191939More planets in this system