HD 128311 b
Orbiting HD 128311
HD 128311 b is an exoplanet orbiting the star HD 128311, discovered in 2002 using the Radial Velocity method.
Minimum Mass (M sin i)
562.24
Earth masses
Orbital Period
453.0
days
Distance
16.3
parsecs
Radius (Earth radii)
Unknown
Minimum Mass, M sin(i) (Earth masses)
562.24
Radial-velocity minimum
Equilibrium Temperature
Unknown
Parameter source: McArthur et al. 2014
Orbital Period
453.019+0.404−0.404days
Semi-Major Axis
1.0840+0.0060−0.0060au
M sin(i) (Earth masses)
562.24+7.31−7.31
M sin(i) (Jupiter masses)
1.7690+0.0230−0.0230
Eccentricity
0.3030+0.0110−0.0110
Epoch of Periastron
2450198.69+4.47−4.47days(JD)
Argument of Periastron
57.9+3.3−3.3deg
Radial Velocity Semi-Amplitude
55.63+0.46−0.46m/s
Distance from Earth
16.3 pc (~53 ly)
Spectral Type
Unknown
Temperature
Unknown
Mass (Solar)
0.83 M☉
Radius (Solar)
0.76 R☉
Luminosity
Unknown
Planets in System
2
Stars in System
1
Coordinates (RA, Dec)
219.0032°, 9.7454°
Discovery Method
Radial Velocity
Discovery Year
2002
Source ID: HD 128311 b
HD 128311 b orbits HD 128311 and was reported in 2002 and was detected with the Radial Velocity method.
Published measurements list a minimum mass of 562.24 Earth masses (M sin i) and an orbital period of 453.02 days.
Catalog data places the system at about 16.3 parsecs from Earth 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 HD 128311More planets in this system