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HD 212771 b | Exoplanets | Apex Andromeda | Apex Andromeda

Planets/Exoplanets/HD 212771 b

Confirmed exoplanet · Gas Giant

HD 212771 b

Orbiting HD 212771

Discovered in 2009 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 212771 b — Generic category artwork—not a direct imageApex Andromeda catalog artwork

Discovery: 2,009
Method: Radial Velocity
Radius: 13.3 R⊕
Mass: 759.6137 M⊕
Orbit: 380.7 days
Distance: 111.155 pc

Planet profile

Orbit and physical properties

Orbital period: 380.7 days
Semi-major axis: 1.19 AU
Eccentricity: 0.076
Radius: 13.3 Earth radii
Mass: 759.6137 Earth masses
Mass provenance: Msini
Density: 1.77 g/cm³
Equilibrium temperature: 507.69 K
Insolation: 10.8749 Earth flux

Host system

Star and system properties

Host star: HD 212771
Stars in system: 1
Known planets in system: 1
Spectral type: G8 IV
Stellar temperature: 5,003 K
Stellar radius: 5.27 R☉
Stellar mass: 1.56 M☉
Stellar metallicity: -0.21 dex
Stellar age: 6 Gyr
Distance: 111.155 parsecs
Right ascension: 22h27m02.98s
Declination: -17d15m50.78s

Discovery

Detection and provenance

Discovery method: Radial Velocity
Discovery year: 2,009
Publication date: 2010-05
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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