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HD 20868 b | Exoplanets | Apex Andromeda | Apex Andromeda

Planets/Exoplanets/HD 20868 b

Confirmed exoplanet · Gas Giant

HD 20868 b

Orbiting HD 20868

Discovered in 2008 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 20868 b — Generic category artwork—not a direct imageApex Andromeda catalog artwork

Discovery: 2,008
Method: Radial Velocity
Radius: 13.7 R⊕
Mass: 397.2875 M⊕
Orbit: 380.85001 days
Distance: 47.7223 pc

Planet profile

Orbit and physical properties

Orbital period: 380.85001 days
Semi-major axis: 0.95 AU
Eccentricity: 0.75
Radius: 13.7 Earth radii
Mass: 397.2875 Earth masses
Mass provenance: Msini
Density: 0.849 g/cm³
Equilibrium temperature: 207.11 K
Insolation: 0.3278 Earth flux

Host system

Star and system properties

Host star: HD 20868
Stars in system: 1
Known planets in system: 1
Spectral type: K3/4 IV
Stellar temperature: 4,802 K
Stellar radius: 0.76 R☉
Stellar mass: 0.39 M☉
Stellar metallicity: 0.05 dex
Stellar age: 4.5 Gyr
Distance: 47.7223 parsecs
Right ascension: 03h20m43.06s
Declination: -33d43m46.88s

Discovery

Detection and provenance

Discovery method: Radial Velocity
Discovery year: 2,008
Publication date: 2009-03
Discovery locale: Ground
Facility: La Silla Observatory
Telescope: 3.6 m ESO Telescope
Instrument: HARPS Spectrograph
NASA Exoplanet Archive: Open composite record ↗

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