HD 20781 b
Orbiting HD 20781
HD 20781 b is an exoplanet orbiting the star HD 20781, discovered in 2019 using the Radial Velocity method.
Minimum Mass (M sin i)
1.93
Earth masses
Orbital Period
5.3
days
Distance
36.0
parsecs
Radius (Earth radii)
Unknown
Minimum Mass, M sin(i) (Earth masses)
1.93
Radial-velocity minimum
Equilibrium Temperature
Unknown
Parameter source: Udry et al. 2019
Orbital Period
5.314+0.001−0.001days
Semi-Major Axis
0.0529+0.0024−0.0027au
M sin(i) (Earth masses)
1.93+0.39−0.36
M sin(i) (Jupiter masses)
0.0061+0.0012−0.0011
Eccentricity
0.1000+0.1100−0.0700
Epoch of Periastron
2455503.20+2.10−1.59days(BJD)
Argument of Periastron
84.0+141.7−108.4deg
Radial Velocity Semi-Amplitude
0.91+0.15−0.15m/s
Distance from Earth
36.0 pc (~117 ly)
Spectral Type
K0 V
Temperature
5256 K
Mass (Solar)
0.70 M☉
Radius (Solar)
Unknown
Luminosity
-0.31 log L☉
Planets in System
5
Stars in System
2
Coordinates (RA, Dec)
50.0140°, -28.7841°
Discovery Method
Radial Velocity
Discovery Year
2019
Source ID: HD 20781 b
HD 20781 b orbits HD 20781 and was reported in 2019 and was detected with the Radial Velocity method.
Published measurements list a minimum mass of 1.93 Earth masses (M sin i) and an orbital period of 5.31 days.
Catalog data places the system at about 36 parsecs from Earth, a host star classified as K0 V, and 5 known planets in the system.
Host star
Explore the stellar record for this system to compare temperature, spectral type, and known planets.
Open HD 20781More planets in this system