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HD 81688 b | Exoplanets | Apex Andromeda | Apex Andromeda

Planets/Exoplanets/HD 81688 b

Confirmed exoplanet · Gas Giant

HD 81688 b

Orbiting HD 81688

Discovered in 2007 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 81688 b — Generic category artwork—not a direct imageApex Andromeda catalog artwork

Discovery: 2,007
Method: Radial Velocity
Radius: 13.5 R⊕
Mass: 525.688185 M⊕
Orbit: 183.93 days
Distance: 85.7183 pc

Planet profile

Orbit and physical properties

Orbital period: 183.93 days
Semi-major axis: 0.648 AU
Eccentricity: 0.04
Radius: 13.5 Earth radii
Mass: 525.688185 Earth masses
Mass provenance: Msini
Density: 1.17 g/cm³
Equilibrium temperature: 958.66 K
Insolation: 143.6043 Earth flux

Host system

Star and system properties

Host star: HD 81688
Stars in system: 1
Known planets in system: 1
Spectral type: K0 III-IV
Stellar temperature: 4,797 K
Stellar radius: 11.13 R☉
Stellar mass: 1.07 M☉
Stellar metallicity: -0.32 dex
Stellar age: 1.48 Gyr
Distance: 85.7183 parsecs
Right ascension: 09h28m39.98s
Declination: +45d36m03.33s

Discovery

Detection and provenance

Discovery method: Radial Velocity
Discovery year: 2,007
Publication date: 2008-06
Discovery locale: Ground
Facility: Okayama Astrophysical Observatory
Telescope: 1.88 m Telescope
Instrument: HIDES Echelle Spectrograph
NASA Exoplanet Archive: Open composite record ↗

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