HD 128311 c
Orbiting HD 128311
HD 128311 c is an exoplanet orbiting the star HD 128311, discovered in 2005 using the Radial Velocity method.
Mass
1204.26
Earth masses
Orbital Period
921.5
days
Distance
16.3
parsecs
Radius (Earth radii)
Unknown
Mass (Earth masses)
1204.26
Measured
Equilibrium Temperature
Unknown
Parameter source: McArthur et al. 2014
Orbital Period
921.538+1.150−1.150days
Semi-Major Axis
1.7400+0.0100−0.0100au
Planet Mass (Earth masses)
1204.26+293.67−137.30
Planet Mass (Jupiter masses)
3.7890+0.9240−0.4320
Eccentricity
0.1590+0.0060−0.0060
Epoch of Periastron
2449565.62+18.01−18.01days(JD)
Argument of Periastron
15.4+6.9−6.9deg
Radial Velocity Semi-Amplitude
74.80+1.50−1.50m/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
2005
Source ID: HD 128311 c
HD 128311 c orbits HD 128311 and was reported in 2005 and was detected with the Radial Velocity method.
Published measurements list a mass of 1,204.26 Earth masses and an orbital period of 921.54 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