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HD 128311 c | Exoplanets | Apex Andromeda | Apex Andromeda

Planets/Exoplanets/HD 128311 c

Confirmed exoplanet · Gas Giant

HD 128311 c

Orbiting HD 128311

Discovered in 2005 using Radial Velocity. This page reflects the latest synchronized NASA Exoplanet Archive composite record.

NASA Archive record ↗Back to catalog →

Generic gas giant catalog artwork; not a direct image of HD 128311 c — Generic category artwork—not a direct imageApex Andromeda catalog artwork

Discovery: 2,005
Method: Radial Velocity
Radius: 13 R⊕
Mass: 1,204.25787 M⊕
Orbit: 921.538 days
Distance: 16.3292 pc

Planet profile

Orbit and physical properties

Orbital period: 921.538 days
Semi-major axis: 1.74 AU
Eccentricity: 0.159
Radius: 13 Earth radii
Mass: 1,204.25787 Earth masses
Mass provenance: Mass
Density: 3.01 g/cm³
Equilibrium temperature: 158.23 K
Insolation: 0.1017 Earth flux

Host system

Star and system properties

Host star: HD 128311
Stars in system: 1
Known planets in system: 2
Spectral type: K0
Stellar temperature: 4,965 K
Stellar radius: 0.76 R☉
Stellar mass: 0.828 M☉
Stellar metallicity: 0.08 dex
Stellar age: 0.96 Gyr
Distance: 16.3292 parsecs
Right ascension: 14h36m00.78s
Declination: +09d44m43.57s

Discovery

Detection and provenance

Discovery method: Radial Velocity
Discovery year: 2,005
Publication date: 2005-10
Discovery locale: Ground
Facility: W. M. Keck Observatory
Telescope: 10 m Keck I Telescope
Instrument: HIRES Spectrometer
NASA Exoplanet Archive: Open composite record ↗

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