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HD 217786 b | Exoplanets | Apex Andromeda | Apex Andromeda

Planets/Exoplanets/HD 217786 b

Confirmed exoplanet · Gas Giant

HD 217786 b

Orbiting HD 217786

Discovered in 2011 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 217786 b — Generic category artwork—not a direct imageApex Andromeda catalog artwork

Discovery: 2,011
Method: Radial Velocity
Radius: 12.3 R⊕
Mass: 4,402.559094 M⊕
Orbit: 1,301.36009 days
Distance: 55.4847 pc

Planet profile

Orbit and physical properties

Orbital period: 1,301.36009 days
Semi-major axis: 2.446 AU
Eccentricity: 0.311
Radius: 12.3 Earth radii
Mass: 4,402.559094 Earth masses
Mass provenance: Mass
Density: 13 g/cm³
Equilibrium temperature: 207.3 K
Insolation: 0.3159 Earth flux

Host system

Star and system properties

Host star: HD 217786
Stars in system: 2
Known planets in system: 2
Spectral type: F8 V
Stellar temperature: 5,966 K
Stellar radius: 1.27 R☉
Stellar mass: 1.14 M☉
Stellar metallicity: -0.135 dex
Stellar age: 7.6 Gyr
Distance: 55.4847 parsecs
Right ascension: 23h03m08.11s
Declination: -00d25m49.29s

Discovery

Detection and provenance

Discovery method: Radial Velocity
Discovery year: 2,011
Publication date: 2011-03
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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