HD 181720 b
Orbiting HD 181720
HD 181720 b is an exoplanet orbiting the star HD 181720, discovered in 2009 using the Radial Velocity method.
Minimum Mass (M sin i)
127.13
Earth masses
Orbital Period
956.0
days
Distance
60.2
parsecs
Radius (Earth radii)
Unknown
Minimum Mass, M sin(i) (Earth masses)
127.13
Radial-velocity minimum
Equilibrium Temperature
Unknown
Parameter source: Stassun et al. 2017
Orbital Period
956.000+14.000−14.000days
Semi-Major Axis
1.8500+0.0400−0.0400au
M sin(i) (Earth masses)
127.13+19.07−19.07
M sin(i) (Jupiter masses)
0.4000+0.0600−0.0600
Eccentricity
0.2600+0.0600−0.0600
Radial Velocity Semi-Amplitude
8.40+0.40−0.40m/s
Distance from Earth
60.2 pc (~196 ly)
Spectral Type
Unknown
Temperature
5736 K
Mass (Solar)
1.03 M☉
Radius (Solar)
1.50 R☉
Luminosity
Unknown
Planets in System
1
Stars in System
1
Coordinates (RA, Dec)
290.7212°, -32.9208°
Discovery Method
Radial Velocity
Discovery Year
2009
Source ID: HD 181720 b
HD 181720 b orbits HD 181720 and was reported in 2009 and was detected with the Radial Velocity method.
Published measurements list a minimum mass of 127.13 Earth masses (M sin i) and an orbital period of 956 days.
Catalog data places the system at about 60.2 parsecs from Earth and 1 known planet in the system.
Host star
Explore the stellar record for this system to compare temperature, spectral type, and known planets.
Open HD 181720